First, we must understand the different types of migration. The different types of migration are
seasonal, nomadic, removal, reproductive, complete, irruptive migration
The most common type migration is seasonal. there are two types of seasonal migration these two types are altitudinal and latitudinal migrations. Altitudinal migration occurs when animals move to higher elevations in warmer weather and back down to lower elevations in colder weather.
Latitudinal migration occurs when animals move south in the fall and north in the spring.
Nomadic migration occurs when animals leave an area in search of food. Grazing animals such as elk, bison, and wild cattle are a few examples.
Removal migration occurs when a population migrates and does not return. The most common cause is habitat destruction from disasters such as fire, flood, and human encroachment causing the area to be unable to support food, water or shelter. Also, if the population in the habitat area becomes over-crowed, this will cause a population to locate somewhere else.
Reproductive migration occurs when animals locate to a habitat needed to bear there young in a safe area from predators. Also, the young might requires a different type of habitat that varies from one age to another.
Partial migration occurs when only a small part of the population leaves the area and the rest stay behind. In truth, some animals adapt to the area with milder winters and cooler summers. Other factors may cause some species not to relocate south for the winter or north for the summer.
Complete migration occurs when all the population leave the area during specific season. These groups usually travel long distances and return to their habitat
Irruptive migration is the unpredictable movement of some of the population to leave the area at different times and distances. this sometime happens during the stress of famine, overpopulation of the area or by some odd influence.
Hibernation is a form of migration the animal will find a den and go into a deep sleep, saving its energy until warmer weather or the return of a food source.
During my time in the field researching the bigfoot phenomenon here in Kentucky all these have applied to bigfoot at one time or another. Seasonal migration occurs during the extreme heat of summer. The bigfoot moves into the deep hollows and valleys to escape the heat, and during winter months they move to the higher ridges and foot hills for the warmth of the sun. Nomadic migration has occurred when sometimes the food source becomes diseased, dies off, or becomes completely exhausted, and it makes sense that a bigfoot would move place to place in search of food. Removal migration has happen in many of my areas of research. We would have abundance of activity until areas are flooded out after extreme rain fall, forest fire, homes being built, or extreme logging. This drives the bigfoot out of an area not to return. Reproductive migration--I do believe that the bigfoot will relocate to a secluded area or safe haven to give birth and teach there young until a certain age.
Partial migration likely occurs in the winters in Kentucky becoming more milder and the abundance of food and water and the extensive cave system we have it is more likely that some bigfoots would migrate and others would not.
I noticed complete migration occurring in the early years that I have researched. There have been times that an active area would go dormant for months and then suddenly become active again. This would happen at specific times and years.
Irruptive migration is very common. Bigfoots are like humans in the sense that if an area gets contaminated by something dangerous we move. The same can be said in the bigfoot world if the ecosystem is stressed the area becomes unlivable so a bigfoot must move on to another suitable area.
Being a researcher, I have my own opinions. I believe that Bigfoots here in Kentucky have adapted to the environment with reports of different colors and lengths of hair--short in the summer months and long in the winter months. With eyewitness statements of gray, white, black, and reddish brown hair, this make the bigfoot able to blend into it natural surroundings. There are reports of bigfoots venturing close to human dwellings taking pet food, raiding freezers of meat, and using abandoned buildings and barns for shelter. There are some that will say that you don't get many reports in the winter, and that's true. However, you must understand that we as humans hate the cold and don't venture out as much as we do in the warmer months. We must take into account that the habits of these creatures keeps changing from year to year. I have seen this thru my journals and experience in the field over the years. I believe they are learning and over-coming obstacles to survive in the changing times. It makes sense not to migrate long distances when you are less able to be spotted. In other environments, greater migration may be needed, but here in Kentucky, we have a climate that is more flexible with varied food sources available at all times of the year. At one time we humans used to migrate long distances in search of warmer climate and food sources until we had to adapt. Bigfoot may be more like us than we care to admit. Thankfully, with deer available year around, fish from rivers that rarely, if ever freeze, and crops, we are able to observe these magnificent creatures year-round.