Have you ever heard Crocodiles moan?
Actually, crocodiles do moan that the sound is described as something between a bark and a roar and the crocodiles also do shed tears, but the latter result from a gland in the top of the mouth which is activated during feeding.
There are also a phrase 'crocodile tears' that mean a hypocritical expression of sadness, originates in the old belief that they moan and sigh like a person in deep distress in order to allure travellers to them and shed tears over their prey while devouring it.
After read this, the possible action you do is maybe go to the zoo and watch the crocodiles.
(x^__^)