The observations of the scientists showed that crocodiles and their close relatives really small percentage, even if they work in ripped prey. But they still have not understood why.

Anecdotes about "crocodile tears" refers to someone who expressed sadness artificially. But not necessarily crocodiles and their relatives expressed their grief in a bluff.

Researchers at the University of Florida, USA, received the tears may have similar functions in human saliva, helps digest food animals. Crocodile tears gland connected to the nasal cavity and it was suggested that generated tears from the eyes, flow into the nasal cavity and throat went down.

"The concept is ancient tears as slippery when it is swallowing food and the tears we see is a little excessive production", researchers said Kent Vliet.

In a 2006 study, scientists at the University of Florida and the University of California, USA, 7 alligators coaching move to eat a dry place, and then they filmed their reactions. The results showed that 5 of the 7 crocodile tears while eating.

The team certainly can not explain the reason why the crocodile tears. But they believe the cause may involve animal panting, hissing while eating. This action pushes air through the sinuses, stimulate the glands secrete tears.