Do animals exhibit homosexual behavior?

Like many species of animals, homosexual activity in penguin populations has been documented. However, a majority of penguins do not display homosexual behavior, and the continuation of the species...

yes.

some ducks, and turtles = turtles already know how to find their way to the ocean w/o learning

Of course, any animal can be homosexual. You've no doubt seen videos of a male dog partaking in sexual activities another male dog, the same applies to deer. You're welcome.

to protect themselves or to protect there family