The researchers suggest that the "weeping" may be caused by the hissing of warm air during feeding, which is forced through the sinuses, stimulating the animals' tear glands into emptying fluid into the eye.
Os investigadores suxeriron que estes "choros" poden ser causados polo bufido de aire quente durante a alimentación, que é forzado a saír polos seos nasais, estimulando as glándulas lacrimais dos animais a baleirar o fluído no ollo.