I would think "Bigfoot" have been using the same methods as the Borneo Rhino, the Javan Rhino, the Tamaraw, the ivory-billed woodpecker, the Siamese
crocodile, the woolly flying squirrel and so on and so forth. By keeping low numbers.
It's no secret that the Native American culture is full of Bigfoot legend - and we even got "sasquatch" because of Native American accounts and
stories. So we know Bigfoot isn't a "pale face" creation of the imagination.
The first "alleged Bigfoot report" was on January 7, 1811. (
A source) Yes, this is a
good 200 years or so after colonisation - but keep the explanation of a small population in mind. Perhaps there simply was not a single "white
man"/Bigfoot encounter until the 19th century. Impossible, you say? As I illustrated earlier countless animals are able to evade humans for decades
(and in some cases centuries). In fact scientists are still discovering
new
species of fauna and flora on a regular basis.
Let's take some more practical examples. The National Kruger Park covers 18,989 square km (7,332 sq mi). There are 2,000+ African lions in the park -
representing one of the biggest populations in the world.
(
A source) Yet, you are considered
extremely lucky if you get to see one of these lions! On average there are about 10-20 confirmed sightings a day. (+/- 5,500 sightings a year.) Which
is not a lot, seeing that the KNP gets about 1,400,000 visitors a year. And frankly the KNP is possibly one of the safest places on the planet for any
lion. They have no reason to hide from humans. Yet. The statistics show they're pretty elusive.
The same can be said about the Knysna Elephant. (Elusive elephants which may be roaming the Knysna forest.) It's pretty damn hard to miss an
elephant. Yet the debate is still going on whether (natural) elephants survive in the Knysna forest...
I spend at least 3 months a year in the Bushveld. And after years in the African Bushveld I'm yet to see a living Honey Badger (Ratel) - even though
I've seen evidence (tracks/hive destruction) of their existence.
In conclusion - animals have been eluding humans for years. Back when we were galloping around on horses playing Cowboys and Indians. And they're
still doing it today with our super-duper-high-tech-equipment.
Heck, just the other day we saw that a
100,000 gorillas have been
evading us without even keeping low numbers.