In Australia, there are spiders big enough to eat snakes.
20
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Only 3% of bird species have penises.
0
The seahorse is the only fish to have a neck.
12
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19