A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
In 2005, in Africa, it was reported that three lions rescued a 12-year-old girl from kidnappers and guarded her for half a day until help came.
46
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
292
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9