Giving a description of a species that is not yet described would seem to be a bit of an exercise in futility, but with so many eyewitness accounts over the years, it is possible to give a detailed description of sasquatch biology.
The sasquatch of North America is a large primate, likely either a great ape or a hominin (in the human genus). We won’t know for sure which until science has a type specimen to study. Like humans, sasquatches tend to walk upright with a bipedal gait, especially when adults. Unlike humans, they appear to be capable of quadrapedal movement as well, especially when stealth is called for.
Adult males typically stand between 8 to 12 feet tall and 3 to 4 feet wide at the shoulders. The males are often seen as wider at the shoulders than at the hips, having an “athletic” build. Females are smaller than males, with most reports at between 7 and 9 feet tall. Females are more often described as having a barrel shaped build, with narrower shoulders than the male and wider hips with a straight line, bulky body. Females have often been seen with two, large, fur-covered breasts.
Their limb proportions are different that those of any of the known apes or humans, having arms and legs of roughly the same length. Apes have legs that are shorter than their arms and humans have legs that are longer than our arms. When standing upright, an adult sasquatch’s fingers hang down past mid thigh, just above or even with the knee.
As can be presumed by their common name, Bigfoot, they do have large, flat feet. The foot profile is wider than a human foot of similar length, and the toes do not slope as sharply from big to little. There is typically little to no arch on the instep. Also unlike a human foot, the sasquatch foot bends in the center at what is known as a metatarsal hinge, a structure common in the great apes but not present in any known hominids.
Their hands are similar to ours, only much larger and the thumb is proportionally shorter than ours.
Many witnesses describe sasquatches as having a pointed head (sagital crest) and prominent brow ridge. However, in a substantial portion of sightings, the being lacks the crest. It is speculated that the crest is likely something that develops as the sasquatch matures into adulthood. It could also be something that is a regional adaptation, developed in regions where sasquatches need larger jaw muscles to chew tougher food. (A sagital crest is the point where the jaw muscles attach to the skull. The larger the crest, the stronger the bite.) We simply do not have enough information to understand this difference.
Their faces are generally flat to slightly protruding, but not as far as an ape’s. They have wide-set, large, dark eyes, under a heavy brow ridge. Their noses are human like, but wider and often “squashed” in appearance. Their mouths are wide with thin lips. Hair covers most of the face except for the nose, upper cheeks, and around the eyes.
Hair covers their entire body except for parts of the face (as noted previously), the palms, soles, and sometimes under the arms. The hair is sometimes longer on the head and shoulders, similar in look to the coat of an Irish setter. Hair color ranges from near black, dark brown, auburn, red, blonde, grey, and white. Most sightings report dark individuals. The skin is usually dark brown to black, but lighter individuals have been reported as well.
Sasquatches have large deep set eyes. The eyes are dark in color, not having the white sclera that we have. Their eyes readily reflect light even in very dark conditions without light detectable by humans. This eye shine is usually red, though blue, green, orange, yellow, and white have been reported. There is a lot of controversy in the Bigfoot research community on how it is that their eyes appear to give off light. Some suggest that they actually glow with some sort of bioluminescence. No known mammalian species has such a mechanic, nor does it make sense biologically. It would make more sense that their eyes are somehow adapted so well to the dark that they can focus the available light even better than other nocturnal species and produce the “glow” as a side-effect. Until science has a body to study, the mechanics of their eye shine will remain a mystery. I (Andy) have personally witnessed this phenomenon at close range as a sasquatch looked in a window near the bed I was in. It is quite stunning to see in a dark forest at night.