Homosexuality, the natural choice? (Gay Animals are Common)

Years ago I saw a study that showed that homosexuality among animals increased when the size of the animal "community" (for lack of a better word) grew unwieldy. If the study was accurate it would seem that homosexuality must be regarded as natural. It might be nature's own check on over-population.Has anyone else seen this study or any similar study? Maybe I'm just too tired at the moment, but I can't think of how to search for this on google. If I remember correctly, the study I'm thinking of was cited in Time magazine some few years ago.

I hope you are able to find something, I've tried but without luck.I definitely remember that the article mentioned rats, but I think it also might have mentioned monkeys. If I remember correctly (and this is by no means certain, it really has been a long time) homosexuality increased when environmental changes threatened a particular species. From this, it was speculated that homosexuality might be one of nature's own checks on overpopulation.Incidentally, I am in no way endorsing this notion. I am simply relating the fact that I remember that someone, somewhere once had this idea, and whoever it was was important enough to have his or her research published in a major magazine. If it wasn't Time, it might have been U.S. News, Newsweek, New York or even The Advocate, all of which are magazines I've read with some regularity over the past decade or so. I don't think that the study was the major focus of the article, it was mentioned only as one possible bit of evidence that homosexuality is natural.My mother also read the article, tomorrow I'll call her and see if she remembers what magazine it appeared in.