Well, as it turns out, take a bus trip at the San Diego Zoo: they still go for it. Listen to the driver expound on how animal choices are passed on to their children. Wonder about its genetic basis. Realize that giraffes might not make all those choices.
But enthusiasm for environmentalism? Right up there. Goes along with my general theory that the only people who are enthusiastic environmentalists are those who can't follow biology, and its sub-discipline, ecology, because they don't want to do all that science stuff.