Sentence:  Industrial and rural expansion is shrinking and destroying the Nile <WSD>crocodile's</WSD> natural habitat. The Nile <WSD>crocodiles</WSD>, in particular, have been a source of highly durable leather for a variety of products which can be crafted and manufactured. 
Meaning of the word marked with <WSD> tags:  Any of the predatory amphibious reptiles of the family Crocodylidae;  a crocodilian, any species of the order Crocodilia, which also includes the alligators, caimans and gavials.