The following is a partial list of other species in which homosexual behavior has been documented, including reptiles/amphibians, fishes, insects and other invertebrates, and domesticated animals.
Abbreviations are used to indicate the general type of homosexuality (and in some cases, transgender) for each species:
F = female homosexuality
M = male homosexuality
FTvM = female-to-male transvestism
MTvF = male-to-female transvestism
P = parthenogenesis