I was very surprised to learn that males will actually discard offspring that he even slightly doubts is his. But I guess that is evident in human society as well. If a man believes his woman partner has "cheated" on him and the child is not his, he will demand a paternity test and may actually leave the life of the child. Obviously, the animal kingdom does not have paternity tests.
How accurate are males in recognizing when offspring is not his? And females, on parasitic eggs?
Interesting questions.
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