All God's Critters Got a Place in the (gay) Choir
A model — the one that invariably draws most giggles from the exhibition’s younger visitors — shows a male Amazonian river dolphin penetrating another’s blowhole. “This is the only example of nasal sex we have in nature,” Brockman observes.
Up to a fifth of all king penguin couples kept in captivity are gay, we learn from a display of stuffed penguins wearing pink scarves. Hooded seagulls, sea otters, fish, kangaroos, fruit bats, blue jays, storks, pine martens and owls make guest appearances. So does the lowly hedgehog (ouch).
Now that's a field trip I would have remembered.
PS: I just grabbed this picture off the net. I don't know if those giraffes are same-gendered or not.