homosexual necrophilia is naturalclearly, i am working way too hard trying to get published. And this is the paper that helped me come to this realization:
The first case of homosexual necrophilia in the mallard Anas platyrhynchos (Aves: Anatidae) as published in DEINSEA - annual of the natural history museum rotterdam.
Next to the obviously dead duck, another male mallard (in full adult plumage without any visible traces of moult) was present (Fig. 2a). He forcibly picked into the back, the base of the bill and mostly into the back of the head of the dead mallard for about two minutes, then mounted the corpse and started to copulate, with great force, almost continuously picking the side of the head (Fig. 2b).And if anyone has this book, one of the paper's major references, i would love to borrow it :-P