But wait, it goes beyond mere necrophilia.
|Rhinella proboscidea. Image: phenomena.nationalgeographic.com|
The males form huge mating balls so heavy around a single female to the point where the female sometimes drowns. Undeterred, the males would then rhythmically press the sides of the belly of the dead female to extract the eggs, which would be then fertilized. That's a combination of necrophilia plus mutilation. Eww...
|A male R. proboscidea with a dead female. Image: phenomena.nationalgeographic.com|
Frankly, I can't see any benefit for the species because with this strategy, each female would have only one chance of passing on her genes, unlike other less "violent" species where the females could lay different batch of eggs.
Perhaps some other researcher can come up with a better idea?