Tan crocs in Chitwan

Ecologists are surprised that crocodiles and gharials in Chitwan National Park are getting orange skins. Researchers at the Leibniz Institute of Freshwater Ecology and Inland Fisheries and Project Mecistops this week linked this to high levels of iron in some of the rivers and streams in the park. The discolouring, however, is temporary, and the rusty particles could wash off in less iron-rich waters. Gharials are critically endangered freshwater crocodiles with only 200 remaining in Chitwan. Mugger crocodiles are more widespread and inhabit marshes and waterways.