1 This is known in other mammals including Ring-tailed Lemurs - also to be seen in the Walled Garden.

2 Ring-tailed lemur males could care less.

3 Madagascar's ring-tailed lemur in the wild.

4 Madagascar ring-tailed lemur, here gnawing a non-native cactus, ably carries pollen for native plants on its muzzle and hands.

5 In this photo, a two-week-old ring-tailed lemur clings on to its mother at the Singapore Zoo.

6 A Madagascar ring-tailed lemur, here gnawing a non-native cactus, ably carries pollen for native plants on its muzzle and hands.

7 Something similar has since been found to apply to fish, lizards, ring-tailed lemurs, rhesus monkeys, chimpanzees—and humans. In many of these animals, though, there is a twist.