The weaver bird is a bird native to sub-saharan Africa. These weaver birds get their name because of the elaborate nests the male finches build for their mates.

It is said that if the female weaver doesn't approve, the male finch will tear up the nest and start over.

Swans, genus Cygnus, are birds of the family Anatidae. The adult male swan is a cob, from the Middle English word - cobbe - which means leader of a group.

The swan song is the song the mute swan sings before it dies.

Swans mate for life.

In the darkness of the deep sea, the male anglerfish detects and follows the scent trial of a female (ten-times his size) of his own species. He bites his chosen one and hangs on.

Soon, their skin fuses, they share a common blood supply and their bodies grow together.