Mugger crocodile (Crocodylus palustris) 

The Mugger crocodile, or the Marsh crocodile, commands respect in the freshwater habitats of southern Iran and the Indian subcontinent. Depending on diet and habitat, males can reach medium-sized lengths of approximately 11.5 feet. 

These creatures feature a distinct dark, olive-brown to black skin that acts as effective camouflage, aided further by their wide snouts. Their habitat choice includes marshes, lakes, and rivers; however, man-made habitats like reservoirs and irrigation channels are not uncommon for these far-traveled reptiles. 

A recent study reveals reptiles' first recorded tool use. Mugger Crocodiles spotted luring prey using sticks on their snouts during the nest-building season. Researchers observed this behavior both in natural habitats and zoological parks.