This little bird is also called Crocodile Bird.
According to a story dating to back to the Greek historian Herodotus , the crocodiles lie on the shore with their mouths open, and the plovers fly into the crocodiles' mouths so as to feed on bits of decaying meat that are lodged between the crocodiles' teeth.
.Egyptian Plovers and crocodiles have a uniquesymbiotic relationship.
Because crocodiles can’t use dental floss, they get foodstuck in their teeth.
All that food rots their teeth and probably causes them some pain.
When a crocodile feels the need for a good tooth cleaning it will sit with its mouth wide open. The Egyptian Plover bird recognizes this invitation,and if one is nearby it will fly into the mouth of the crocodile, eat the food
stuck in its teeth, and fly away
.The crocs “appreciate” the much-needed dentistry and do not eat the birds The plover gets a meal and the crocodile gets avaluable tooth cleaning: they both benefit.
There are many benefits to brushing and flossing your teeth. First and foremost, you can help prevent tooth decay by this practice. Brushing and flossing also prevent gum disease, which is a primary agent in decaying and lost teeth.
P.S even a crocodile knows that!