Question

why human killed those species

Answer 1

A lot of other crocodile species are also dangerous to humans, but most of the others will usually not actively try to hunt them.

Gustave.

Crocodiles of Ramree Island.

Mugger crocodile.

Nile crocodile.

Saltwater crocodile

Answer 2

Which spicies u r talking about ??

By the way humans have destroyed many plant and animal species for their own benefit and greed...