Animals

Sperm whales have ribs that flex after greater water pressure, which allows them to dive deep.

It is estimated that 1 in 500 narwhals has not one but two fangs.

It is native to the Middle East and Asia.

In the nineteenth century, the domestic cavy began to be used as a laboratory animal.

White-browed tit-warblers are very colorful.

Javan hawk-eagles are non-migratory.

When they are in groups, their hierarchical structure becomes visible.

Okapi forest is a mammalian member of Giraffidae family and the only representative of the genus Okapia.

The duration of the pregnancy period in slow worm lizards depends on the temperature of the environment but it can be assumed that on average it lasts from 11 to 13 weeks.

Basking shark (Cetorhinus maximus) is a species of large marine cartilaginous fish.