(EN) Max Harrold, Creature Comforts, in The Advocate, Here Publishing, 16 febbraio 1999, pp. 61–62. URL consultato il 10 marzo 2018.
«In his news book, Biological Exuberance: Animal Homosexuality and Natural Diversity ... author Bruce Bagemihl portrays an animal kingdom that embraces a whole spectrum of sexual orientations ... [and] a complex mosaic that resembles humanity ... 'It's an expanded vision of what the natural world is all about,' [Bagemihl] says. 'We're not alone in having a range of sexual behaviours. This is something that is all-encompassing.' ... At 751 pages and with photos and documentation of homosexual behaviour in more than 450 species of mammals, birds, repties, and insects, Biological Exuberance brings the dusty facts to light as Bagemihl deconstructs the all-heterosexual Noah's Ark we've been sold. ... Although he doesn't claim to know the motivations of animals, Bagemihl says he does know procreation is not always the driving force: 'Same-sex couplings occur in the presence of the opposite sex, and in and out of captivity, and in and out of mating season.'»
