Crocodile is a very fierce reptile. In the process of observing them, humans have found an interesting phenomenon, that is, they will come to shore in sunny weather, and then open their mouths, at this time they will remain motionless for a long time. Researchers have studied this phenomenon and found that the behavior of crocodiles with their mouths open and motionless is not casual, but has a specific purpose.
As mentioned above, crocodiles often open their mouths and do not move, which has a specific purpose. The first is to absorb some of the heat. Especially in sunny weather, crocodiles often come to the shore with their mouths open and do not move. From the point of view of body temperature, crocodiles belong to a poikilothermic animal, that is to say, their body structure can not ensure that their body temperature is in a constant state, but can only absorb and emit heat through the external environment, and open mouth is to absorb part of the heat.
In addition, the crocodile has another purpose with its mouth open. If they just hunt and eat, they open their mouths and do not move, in order to attract toothpick birds. Just after eating, crocodiles will have some residual food in their teeth, which will make them very uncomfortable and have to wait for toothpick birds to clean them up. Toothpick birds can also understand this hint, they will peck the food in the crocodile's teeth after the crocodile opens its mouth, which makes the crocodile more comfortable and the toothpick birds have food to eat.
