A couple things to note: First, by saying homosexuality is a choice, one does not mean something as simple as a sit-down at the local bar and determining that you are going to become a homosexual. Rather, it means that, throughout life, certain environmental, hormonal, and other such conditions line up that change your personal preference. Is it always a conscious choice? Probably not. But could (potentially) research be done to see what those conditions are? Probably. Secondly, animals in the wild are not homosexual. They display homosexual behavior. There's a pretty big difference.