You're literally calling people sexist for writing their observations of animal mating behaviors.

False, and wow. If they observed human males yelling in the direction of their travel, their voices amplified by massive cheeks that females lacked, why would they not make the same conclusions?

It's not sexist to reject the absurd premise that behavior is unaltered by testosterone and estrogen. It is sexist to exclude people because of their gender or shame people because their behavior doesn't fit their gender role. It's nowhere near sexist to write observations about animal's mating behaviors.