Many other animals have similar adaptations. White Tailed Deer Aubrie P., Grade 2, IL The female white tailed deer raises its tail up in the air to signal the fawn of danger. The mother also stamps her foot to signal her fawn. These adaptations are behavioral. The fawns could get eaten and die out because they can't run that fast when they are just born.
Squirrels signal danger to other squirrels by chattering.
The beaver is well adapted to life in the water. Its special tail helps it to swim and its thick coat of fur keeps the beaver warm in cold water. These adaptations are physical because the beaver did not learn these adaptations, it was born with them. The problems the beaver might face without these adaptations are freezing to death in cold water and being caught by a predator if it could not swim. The muskrat has similar adaptations because both animals have a thick coat of fur and they also build dome shaped homes in the water to be safe from predators.