Nicolas Mathevon knows what boils a crocodile’s blood. In Guyana in 2007, when Mathevon played a recording of an infant croc distress call, a bellowing mama croc lunged at the boat he was in.

They display dominance by hissing, bellowing and slapping the water with their tails to communicate. During the nesting season, a mother Nile crocodile deposits her eggs in carefully dug nests ...

According to the report, the famous Sulphur water crocodiles of Manghopir might ... death because they had already lost their ‘loud and bellowing’ voices, could not crawl and kept living ...