Defender of the Faith (Write Back, August 13) claims that animals do not engage in homosexual activity. This is incorrect.
Homosexual behaviour has been observed in marine birds and mammals, particularly primates. In fact, it has been observed in 1,500 species, and in 500 of them it is well documented. It is thought to provide marked benefits, such as reducing intra-species aggression.
The animal kingdom is full of the full spectrum of sexual behaviour, including polygamy, monogamy and just about any sexual act you can think of.