Are there any studies that show that angrogyny exists in the rest of the animal kingdom as well? Homo/bisexuality certainly does, and I know sex isn't the same as gender, but humans don't seem to be the only animals with gender-specific roles, so...I don't know, are there cases where female satin bowerbirds steal blue objects to attract mates, instead of the male birds, or anything? (It'd obviously be a bit hard to ask the animals, "do you feel like you conform to the gender binary, or do identify as something else?", but still...)