Vocalizations

The Voice of the Wilderness: Sasquatch Vocalizations and What They Tell Us

There are sounds in the deep wilderness of the Pacific Northwest that do not belong to anything in the field guides. Not the bugle of a bull elk, not the howl of a wolf, not the territorial screech of a great horned owl, not the deep resonant grunt of a black bear — sounds that every experienced outdoorsperson learns to identify within the first seasons of serious time in the backcountry, sounds that become as familiar and as comfortable as the smell of woodsmoke and the sound of moving water. These are the sounds that belong. They have names, they have sources, they have biological explanations that fit neatly into the established framework of what lives in these forests and what it sounds like when it speaks.

And then there are the other sounds.

The sound that stops you mid-stride on a dark forest trail and roots you to the spot with a physical completeness that bypasses every rational thought process and speaks directly to something ancient and pre-verbal in the architecture of your nervous system. The sound that wildlife biologists with decades of field experience in the Pacific Northwest backcountry have heard and subsequently described, with the careful precision of trained scientific observers, as unlike anything in their professional experience. The sound that witnesses — hunters, hikers, loggers, campers, researchers — describe not merely as loud or startling but as fundamentally, categorically, and irreducibly wrong in a way that the word loud does not begin to capture and that no recording, however high its fidelity, fully conveys to someone who has not heard it in the field.

The vocalizations attributed to the North American Sasquatch are, in the considered judgment of Sasquatch Syndicate and of every serious researcher who has engaged with the audio evidence carefully and analytically, one of the most compelling and most scientifically significant categories of evidence in the entire Sasquatch research record. They are also one of the most underappreciated — overshadowed by the more immediately dramatic footprint evidence and the more viscerally gripping eyewitness encounter accounts, yet containing within their acoustic structure a richness of biological information that, when analyzed with the appropriate tools and the appropriate scientific framework, tells us things about Sasquatch that no other category of evidence can.

This article is our most comprehensive and most carefully considered treatment of the Sasquatch vocalization evidence — the whoops, the screams, the howls, the chatterings, the wood knocks, the infrasonic rumbles, and the extraordinary range of other acoustic productions that the evidence record attributes to this creature. We draw on documented audio recordings, on the acoustic analysis work of professional bioacousticians, on the comparative primate vocalization literature, and on the accumulated body of witness testimony that describes these sounds from the perspective of direct field experience. What emerges from that evidence, examined honestly and rigorously, is a portrait of a creature with a vocal repertoire of extraordinary complexity and apparent sophistication — a repertoire that reflects both the biological heritage of a large primate and the specific communicative demands of a wide-ranging, socially organized, highly intelligent species navigating the acoustic environment of the Pacific Northwest wilderness.

The Acoustic Environment — Understanding the StageBefore we examine the specific vocalizations attributed to Sasquatch, it is worth spending a moment understanding the acoustic environment in which those vocalizations occur — because the specific characteristics of the Pacific Northwest forest as an acoustic medium have directly shaped, through the mechanisms of natural selection, the vocal repertoire of every species that communicates within it. And understanding those characteristics is essential to appreciating both why Sasquatch vocalizations have the specific acoustic properties they do and why the acoustic evidence for Sasquatch is, in many ways, more robust and more independently verifiable than many other categories of physical evidence.

Sound propagation in a dense temperate rainforest is a complex and ecologically consequential phenomenon. The dense vegetation of the Pacific Northwest old-growth forest attenuates sound through scattering and absorption, with the degree of attenuation varying significantly with frequency — higher-frequency sounds lose energy more rapidly to vegetation absorption than lower-frequency sounds, which can penetrate forest cover over greater distances with less attenuation. This acoustic reality has driven the evolution, in Pacific Northwest forest species, of communication signals that exploit the specific transmission properties of the forest environment — using lower frequencies for long-range communication, using specific temporal patterns that stand out against the background noise of wind and water, and using amplitude — sheer volume — to overcome the attenuating effects of dense vegetation.

The acoustic environment also provides, paradoxically, one of the most important qualities of the Sasquatch audio evidence: the ability to rule out known alternative explanations. Every species that inhabits the Pacific Northwest forest has a known and documented acoustic signature — a specific set of vocalizations whose frequency characteristics, temporal patterns, amplitude profiles, and harmonic structures are known to wildlife biologists and bioacousticians. When a recording of an unknown vocalization is subjected to spectrographic analysis and compared against this known acoustic database, the ability to definitively rule out attribution to known species represents a meaningful forensic finding — not proof of Sasquatch, but genuine evidence of an acoustic anomaly that demands explanation.

The Scream — The Sound That Defines the Encounter
Of all the vocalizations attributed to the North American Sasquatch, the scream is the most dramatic, the most extensively documented, and the most immediately and viscerally compelling to anyone who has heard it — whether in person in the field or in the audio recordings that have been captured and analyzed by researchers over the past several decades. It is the vocalization most frequently described in eyewitness encounter accounts, the one most commonly cited as the auditory component of a full Sasquatch encounter experience, and the one whose acoustic characteristics have been most extensively subjected to professional bioacoustic analysis.

The Sasquatch scream, as described across hundreds of independently obtained eyewitness accounts and as documented in multiple audio recordings of varying quality, is characterized by a set of specific acoustic properties that, taken together, distinguish it from every known vocalization in the North American wildlife acoustic database. It is extraordinarily loud — witnesses consistently describe it as the loudest non-mechanical sound they have ever heard, with volume estimates that, when triangulated against the distances at which the sound was heard and the specific acoustic attenuation characteristics of the terrain in which it occurred, imply source amplitude levels in the range of 100 to 130 decibels or higher — comparable to the sound pressure levels produced by a jet engine at close range or a military artillery discharge. It has a frequency range that begins at the lower limit of human auditory perception and descends, in many accounts, below that limit — into the infrasonic range below 20 Hz — producing the characteristic physical resonance sensation, the feeling of sound felt in the chest and skull rather than merely heard through the ears, that witnesses so consistently and so specifically describe.

It has a duration that far exceeds any known North American wildlife vocalization of comparable amplitude — witnesses routinely describe screams that sustain for three, five, seven seconds or more without the amplitude decay that characterizes the screams and calls of known species, suggesting a respiratory capacity and a vocal tract architecture of extraordinary dimensions. And it has a quality that witnesses, struggling to find adequate verbal comparisons in their experience of known sounds, most consistently describe as simultaneously human and profoundly not human — a vocalization that carries enough of the harmonic and temporal structure of a human scream to trigger the human social brain's recognition of a distress or threat signal while differing from any human vocalization in ways that are immediately and unmistakably apparent to anyone who hears it.

The Sierra Sounds — A Landmark in the Audio Evidence Record
The most extensively analyzed, most professionally scrutinized, and most scientifically significant audio recordings of alleged Sasquatch vocalizations in the research record are the recordings made by Ron Morehead and Al Berry in the Sierra Nevada of California during the early 1970s — a series of recordings captured at a remote backcountry camp over multiple seasons of field investigation that have come to be known collectively as the Sierra Sounds, and that represent, in the judgment of every professional bioacoustician who has subjected them to serious analysis, one of the most extraordinary and most difficult-to-explain acoustic documents in the history of wildlife recording.

The Sierra Sounds recordings — made on consumer-grade audio equipment under field conditions that precluded any possibility of studio manipulation or post-production alteration — document a range of vocalizations including screams, howls, apparent conversational exchanges between multiple individuals, and a category of rapid, modulated, apparently language-like vocalization that has been the subject of particular and sustained analytical attention. The amplitude of the vocalizations documented in the recordings, measured against the known characteristics of the recording equipment and the documented distances at which the sounds were captured, implies source sound pressure levels that, as noted above, are comparable to industrial machinery and that no known North American primate — including the human voice at maximum effort — can approach.

The recordings were subjected to professional acoustic analysis by Dr. R. Lynn Binford of the University of Wyoming, whose spectrographic analysis confirmed that the vocalizations in the Sierra Sounds recordings could not be attributed to any known North American animal and displayed acoustic characteristics — frequency range, harmonic structure, amplitude envelope, and temporal patterning — inconsistent with human vocalization and inconsistent with any known wildlife species in the Sierra Nevada region. The recordings have since been analyzed by multiple additional investigators, including professional audio engineers and bioacousticians, none of whom have been able to identify a known biological or non-biological source for the vocalizations they document.

Perhaps the most remarkable and most scientifically intriguing dimension of the Sierra Sounds recordings is the category of vocalization that researchers have informally termed "samurai chatter" — a rapid, highly modulated sequence of sounds that, in its temporal patterning and its apparent internal structure, bears a superficial resemblance to human speech while differing from any known human language in its phonemic inventory, its prosodic structure, and the acoustic characteristics of its constituent sounds. The samurai chatter vocalizations were subjected to formal linguistic analysis by Dr. R. Scott Nelson, a retired U.S. Navy crypto-language analyst with professional training in the acoustic analysis of unknown languages, who concluded — after extensive spectrographic and temporal analysis of the recordings — that the vocalizations display the formal characteristics of a structured communication system: consistent use of specific sound units, rule-governed combination of those units into longer sequences, and a temporal organization consistent with the information-bearing structure of language rather than with the random or stereotyped acoustic production of animal calls.

Dr. Nelson's conclusion — that the Sierra Sounds samurai chatter vocalizations may represent a genuine, structured, non-human communication system — is one of the most extraordinary and most consequential findings in the history of Sasquatch audio research, and it deserves far more serious scientific engagement than it has received from the mainstream academic community. If correct, it implies a level of cognitive and communicative sophistication in Sasquatch that goes well beyond what is known of any non-human primate vocal communication system — approaching, and in some respects potentially equaling, the structural complexity of human language. We will return to this implication in the discussion of Sasquatch vocal complexity below.

The Whoop — The Sound of the Territory
The whoop is, in terms of frequency of documentation in field encounter reports and in terms of geographic breadth of distribution across the Sasquatch encounter record, probably the most commonly reported Sasquatch vocalization after the scream — and it is a vocalization whose specific acoustic characteristics and apparent behavioral context make it one of the most informative in the entire repertoire from a bioacoustic and behavioral standpoint.
The Sasquatch whoop, as described across the field evidence record, is a rising, modulated vocalization — beginning at a lower pitch and rising through a characteristic frequency arc before sustaining at or near the apex of the rise for a period of one to three seconds and then either abruptly terminating or gradually decaying. It is loud — not scream-loud, but substantially louder than any known North American primate vocalization at equivalent distances — and it carries over remarkable distances through forest cover, with witnesses reporting clearly audible whoops from distances that, given the acoustic attenuation characteristics of the terrain and vegetation between source and observer, imply source amplitudes substantially exceeding those of any known wildlife species in the region.

The most diagnostically important characteristic of the Sasquatch whoop from a behavioral standpoint is its apparent function as a call-and-response signal — a vocalization produced by one individual that elicits an answering whoop from another individual at a distance, in a pattern of acoustic exchange that field researchers who have spent extended time in active Sasquatch research areas describe as clearly distinguishable from the random or territorial calling behavior of known wildlife species by its interactive, apparently conversational character. The call-and-response whoop exchanges documented by field researchers in the Olympic Peninsula, the Cascade Range, and other high-activity research areas — in which a whoop produced by a distant individual is answered by another whoop from a different direction, followed by additional whoops from additional directions, in a spatial and temporal pattern consistent with the acoustic coordination of multiple widely separated individuals — implies a social use of vocalization for group coordination and spatial communication that is directly analogous to the long-range contact call systems documented in elephants, great apes, and other socially organized, wide-ranging species.

The Whoop in the Context of Great Ape Vocal Communication
The whoop vocalization of Sasquatch — its acoustic characteristics, its apparent call-and-response behavioral context, and its apparent function in long-range social coordination — maps closely onto the long-distance contact call systems documented in chimpanzees and other great apes, and this correspondence deserves specific and careful analytical attention because it provides important information about the evolutionary origin and the behavioral function of the Sasquatch whoop.

Chimpanzees produce a vocalization known as the pant-hoot — a long-distance contact call that begins with a series of low hoots, builds through a climax phase of increasing amplitude and excitement, and concludes with a high-amplitude, high-frequency screaming call that can carry over distances of up to two kilometers through forest cover. The pant-hoot serves multiple social functions simultaneously — it advertises the caller's location to other group members, it signals the caller's identity through individual-specific acoustic features that other chimpanzees recognize and respond to, it communicates the caller's emotional state and motivational intensity through specific variations in the temporal and frequency structure of the call, and it functions as a long-range coordination signal that allows spatially dispersed group members to maintain social cohesion across distances that preclude visual contact.
The Sasquatch whoop, while differing from the chimpanzee pant-hoot in its specific acoustic structure in ways that reflect the different vocal anatomy and different acoustic environment of its producer, shares the fundamental functional architecture of the pant-hoot — a long-range, individually distinctive, emotionally informative contact call produced in a call-and-response context that serves to coordinate the spatial behavior of multiple widely separated individuals. If this functional correspondence reflects a genuine evolutionary homology — if the Sasquatch whoop and the chimpanzee pant-hoot are both expressions of a long-distance contact call system inherited from a common great ape ancestor — then the Sasquatch whoop represents not a mysterious and inexplicable acoustic anomaly but a biological expected feature of the vocal repertoire of a large, socially organized, wide-ranging great ape navigating the specific acoustic challenges of the Pacific Northwest forest environment.

The Howl — Sustained, Haunting, and Unlike Anything Else
The howl attributed to Sasquatch in the field evidence record occupies an acoustic category distinct from both the scream and the whoop — it is lower in pitch than the scream, more sustained and less modulated than the whoop, and characterized by a quality that witnesses consistently struggle to describe adequately in the vocabulary of known sounds, resorting instead to comparisons that acknowledge the inadequacy of any known reference: like a wolf howl but deeper, longer, and more resonant; like a foghorn but biological and alive; like nothing, precisely, because nothing else in the acoustic inventory of the North American wilderness produces anything quite like it.

The Sasquatch howl, in the accounts that most specifically and most carefully describe it, is a sustained, relatively low-frequency vocalization that carries with it a quality of physical resonance — the characteristic infrasonic component that produces the felt-in-the-chest sensation that witnesses associate with the most powerful Sasquatch vocalizations — and that sustains at a consistent amplitude for durations that witnesses describe as five, ten, or in the most dramatic accounts fifteen or more seconds without the decay that characterizes the howling of wolves or the roaring of bears. The sustained amplitude of the howl — the ability to maintain a high-amplitude vocalization for an extended period without the progressive amplitude decay that reflects respiratory limitation in other species — implies a respiratory capacity and a vocal tract architecture of extraordinary dimensions, consistent with the enormous estimated body mass of the adult Sasquatch.

The geographic and temporal contexts in which the howl is most commonly reported provide important behavioral clues about its function. Howls are disproportionately reported at night and in the pre-dawn hours, during periods of apparent territorial activity, and in the context of encounters in which the witness has been present in an area for an extended period without being aware of the creature's proximity — suggesting that the howl may function, at least in part, as a territorial or warning signal produced in response to the prolonged presence of an intruder in the creature's territory rather than as a routine contact call of the kind that the whoop appears to represent.

The howl is also disproportionately reported in areas of dramatic topographic relief — ridgelines, cliff faces, valley heads, and other landscape features that function as acoustic reflectors, amplifying and projecting sound over greater distances and in more directionally focused patterns than the acoustically dampening interior of dense forest allows. A creature that understands, at some level, the acoustic amplification properties of specific landscape features and that positions itself at those features when producing long-range territorial vocalizations is demonstrating a degree of environmental awareness and behavioral sophistication that, once again, maps closely onto the vocal behavior of the most cognitively sophisticated non-human primates.

Chatterings, Mumbles, and Apparent Conversation
Among the most scientifically intriguing and most rarely discussed categories of vocalization in the Sasquatch evidence record are the short-range, low-amplitude vocalizations — the chatterings, the mumbles, the apparent conversational exchanges — that witnesses describe from close encounter situations where the creature or creatures involved were unaware of the witness's proximity or were engaged in activities that did not appear to involve any awareness of human observation.

These close-range vocalizations are, by their nature, the most difficult to document in high-quality audio recordings — they are quiet, they require proximity to the source that most researchers cannot achieve without alerting the creature, and they occur in behavioral contexts that are inherently rare and unpredictable. But the witness accounts that describe them are, in their specific and independently consistent details, among the most compelling in the entire Sasquatch vocalization evidence record.

Witnesses who have observed Sasquatch at close range without being detected — a category of encounter that is rare but recurrent in the research record, typically involving witnesses who were stationary and downwind at the time of the encounter — describe a range of low-amplitude vocalizations that bear a striking and consistently reported resemblance to the background vocal behavior of humans engaged in quiet conversation. Soft grunts and rumbles of apparent communicative intent. Modulated, melodic sounds of varying pitch that lack the stereotyped character of animal calls and suggest instead the kind of flexible, context-responsive acoustic production associated with intentional communication. In some accounts — including several from witnesses with professional backgrounds in linguistics or speech pathology that lend their specific acoustic observations particular credibility — what sounds unmistakably like a pattern of turn-taking between multiple individuals: one individual producing a sequence of sounds, a pause, another individual producing a responding sequence, another pause, and so on in a temporal organization that is the acoustic signature of conversational exchange rather than the overlapping, non-responsive calling behavior of most known wildlife species.

These conversational chatter accounts are, in the judgment of Sasquatch Syndicate, among the most significant in the entire vocalization evidence record — not because they are the most dramatic or the most easily documented, but because they speak most directly to the question of cognitive and communicative sophistication that underlies the entire Sasquatch research enterprise. A creature that engages in apparent conversational exchange — in turn-taking, in responsive acoustic production, in the kind of mutual attention and shared communicative intent that conversation requires — is not behaving like an animal. It is behaving like something more.

Wood Knocks — Percussion as Language
The wood knock — the deliberate striking of a hard object, typically a large branch or a log, against a tree trunk or another piece of wood to produce a sharp, resonant percussive sound — occupies a unique position in the Sasquatch vocalization and communication evidence record, because it represents not a biological vocalization produced by the creature's own vocal anatomy but a tool-mediated acoustic signal produced through the deliberate use of an environmental object to generate sound. As such, it bridges the gap between the vocalization evidence and the stone use evidence discussed in our earlier article on Sasquatch and the Stone Age, and it represents one of the most compelling and most extensively documented behaviors in the entire Sasquatch behavioral repertoire.

Wood knocks have been documented across the full geographic range of the Sasquatch evidence record — from the Olympic Peninsula and the Cascade Range through the Sierra Nevada and into the Appalachian wilderness of the eastern United States — by hundreds of independent witnesses whose accounts, while varying in their specific details, are consistent in their fundamental description of the acoustic event. The sound is distinctive and immediately recognizable to anyone who has heard it in the field: a sharp, resonant, wooden impact sound of substantial amplitude — louder than any branch-on-branch contact that wind or animal movement might incidentally produce — produced in a pattern and at a rate that is inconsistent with any known natural process and that, in the most compelling documented exchanges, occurs in a call-and-response pattern between two or more sources at different locations that implies deliberate communicative intent.

The comparative primate behavior literature provides direct and important context for the wood knock behavior. Chimpanzees — as discussed in our earlier articles — are well documented to produce percussive signals by drumming on the buttress roots of large trees during charging displays and territorial assertion behaviors, a behavior that serves both an acoustic communication function and a visual display function, and that has been documented to elicit specific behavioral responses from other chimpanzee individuals up to distances of several kilometers. The great distances over which wood knock exchanges have been documented in Sasquatch research areas — exchanges in which knocks produced by researchers have been answered by knocks from sources at distances of half a mile, a mile, or more — imply a source amplitude substantially exceeding what a human being striking wood with maximum effort can produce, consistent with the extraordinary physical dimensions of the adult Sasquatch.

The most sophisticated and most carefully documented wood knock exchanges in the research record are those in which the response to a researcher's knock is not a simple single-knock echo but a structured sequence of knocks — two knocks responding to one, three knocks responding to two, a specific temporal pattern responding to a different specific temporal pattern — in a way that suggests not merely acoustic reactivity but genuine communicative encoding, the use of specific knock patterns to convey specific information in a structured acoustic signaling system analogous to Morse code or drum language.

Mimicry — The Acoustic Chameleon
One of the most extraordinary and most underappreciated dimensions of the Sasquatch vocal evidence record is the body of witness accounts describing what can only be characterized as acoustic mimicry — the apparent reproduction, by Sasquatch, of the vocalizations of other species in the Pacific Northwest fauna, and in some accounts the apparent reproduction of human speech sounds, with a fidelity that witnesses find simultaneously impressive and deeply unsettling.

Acoustic mimicry — the reproduction of the vocalizations of other species — is documented in multiple bird species, most famously the lyrebird of Australia, the mockingbird of North America, and the starling, all of which demonstrate the ability to reproduce the calls of other species with remarkable fidelity. In mammals, acoustic mimicry is less common but not unknown — several dolphin and whale species have been documented reproducing the vocalizations of other cetacean species, and there are documented cases of captive great apes reproducing specific human speech sounds under conditions of intensive training.

What the Sasquatch mimicry accounts describe goes substantially beyond what has been documented in any of these known examples, and the accounts deserve careful and specific attention precisely because of the extraordinary cognitive and vocal anatomical capabilities they imply. Witnesses in multiple independent accounts describe hearing vocalizations in forest environments that were initially attributed to known species — owl calls, coyote howls, elk bugles, even human speech sounds — and then realizing, through inconsistencies in the sound itself or through subsequent observation, that the sound was being produced by a large, non-avian, non-ungulate, non-human source. The apparent reproduction of human speech sounds — fragments of words, vocal inflections, call-and-response patterns that mirror the acoustic structure of human conversation — appears in a small but recurring subset of close-encounter accounts whose witnesses include individuals with professional backgrounds in acoustics, linguistics, and wildlife biology, and whose specific and independently consistent descriptions make the dismissal of these accounts through simple observer error or confabulation difficult to sustain.

The cognitive and vocal anatomical requirements for acoustic mimicry of the kind described in these accounts are substantial. High-fidelity reproduction of the vocalizations of other species requires, at minimum, precise auditory discrimination of the acoustic features of the target vocalization, the motor learning capacity to reproduce those features through voluntary control of the vocal production apparatus, and the memory capacity to retain the acoustic template of the target vocalization for subsequent reproduction. These are non-trivial cognitive demands — demands that, in the species in which acoustic mimicry has been most extensively documented, are associated with neural architecture of considerable sophistication. Their apparent presence in Sasquatch represents yet another data point in the accumulating portrait of a creature whose cognitive capabilities substantially exceed what the popular conception of a "wild man of the woods" would suggest.

The Vocal Anatomy Question — What Kind of Voice Box Could Do This?
The acoustic characteristics of the Sasquatch vocalizations documented in the evidence record — their extraordinary amplitude, their extended frequency range, their apparent structural complexity, and the specific tonal qualities that witnesses consistently describe — have direct and important implications for the anatomy of the vocal production system that generates them, and these anatomical implications are worth examining carefully because they provide independent biological constraints on what kind of creature the Sasquatch is.

The vocal anatomy of a primate — the specific configuration of the larynx, the vocal folds, the supralaryngeal vocal tract, and the associated respiratory musculature — determines the range of sounds that primate can produce, the maximum amplitude it can achieve, and the specific acoustic qualities of its vocalizations. The extraordinary amplitude of the Sasquatch scream — implying source sound pressure levels comparable to industrial machinery — requires a vocal anatomy of dramatic dimensions: vocal folds of substantially greater mass and surface area than the human vocal folds, a larynx of correspondingly greater size, and a respiratory musculature capable of generating the subglottal air pressure necessary to drive those large vocal folds at the rates required for high-amplitude vocalization.

All of these anatomical requirements scale predictably and consistently with body mass across the primate family — larger primates have larger larynges, larger vocal folds, and greater respiratory capacity, and produce proportionally louder vocalizations. The body mass estimates for adult Sasquatch — clustering in the 600 to 1,100 pound range — imply, by the scaling relationships established across the primate family, a vocal anatomy of truly extraordinary dimensions, capable of producing sound pressure levels that dwarf those of any known non-human primate and that are entirely consistent with the amplitude characteristics of the vocalizations documented in the field evidence record.

The extended frequency range of Sasquatch vocalizations — the ability to produce sounds ranging from the infrasonic frequencies below 20 Hz to the upper frequency components documented in the Sierra Sounds recordings — implies a vocal anatomy capable of generating the full range of resonant modes available to a very large vocal tract, from the lowest resonant frequencies associated with a large, compliant vocal tract and massive vocal folds to the higher frequencies associated with specific vocal fold configurations and tract geometries. This frequency range is consistent with — and in fact predicted by — the vocal anatomy of a very large primate, and its documentation in the Sasquatch evidence record represents another point of convergence between the acoustic evidence and the biological framework that the broader evidence record establishes for this creature.

What the Vocalizations Tell Us — A Portrait in Sound
Drawing together the evidence reviewed in this article — the screams, the whoops, the howls, the chatterings, the wood knocks, the mimicry accounts, and the bioacoustic analyses that have been applied to the best documented recordings — what portrait of Sasquatch emerges from the vocalization evidence?

It is the portrait of a creature with a vocal repertoire of extraordinary richness and apparent functional complexity — a repertoire that reflects both the deep evolutionary heritage of great ape vocal communication and the specific communicative demands of a highly intelligent, socially organized, wide-ranging species navigating the complex acoustic environment of the Pacific Northwest wilderness. A creature that screams with an amplitude and a resonance that has no biological parallel in North America. That whoops across forest valleys in structured call-and-response exchanges that coordinate the behavior of multiple widely separated individuals. That howls from ridgelines with a sustained power that carries for miles through dense forest cover. That chatters and mumbles in apparent conversational exchange with conspecifics at close range. That knocks on wood in structured percussive signals that encode information in a tool-mediated acoustic language. And that — in the most extraordinary and most cognitively demanding dimension of its vocal behavior — apparently reproduces the vocalizations of other species with a fidelity that implies acoustic memory, vocal motor learning, and intentional communicative deception of a sophistication that has no established parallel in any known non-human species.

This is not the vocal repertoire of a large, simple animal moving through the forest on instinct. This is the vocal repertoire of something that has things to say — to conspecifics, to competitors, to the forest itself — and that has developed, over an evolutionary history we have yet to fully reconstruct, a remarkable diversity of acoustic tools for saying them.

The forest has been speaking to us for a very long time. We are only beginning to learn how to listen.

Have you heard something in the wilderness that you could not explain? A scream that stopped you cold, a whoop that answered your own call, a wood knock that came back to you from a distance that made no sense, a sound that you have spent years trying to identify and never succeeded? We want to hear from you. Share your experience — with as much acoustic detail as you can provide — in the comments.

BELIEVE

Written by Chuck Geveshausen, Founder — Sasquatch Syndicate Inc. — Covered under our Terms of Use