Crocodile bulks of swallowed prey flesh and bone. Many large crocodilians swallow stones (called gastroliths or stomach stones), which may act as ballast to balance their bodies or assist in crushing food, similar to grit ingested by birds. Herodotus claimed that Nile crocodiles had a symbiotic relationship with certain birds, such as the Egyptian plover, which enter the crocodile's mouth and pick leeches feeding on the crocodile's blood; with no evidence of this interaction actually occurring in any crocodile species, it is most likely mythical or allegorical fiction. Since they feed by grabbing and holding onto their prey, they have evolved
Grey plover Grey plover The grey plover ("Pluvialis squatarola"), known as the black-bellied plover in North America, is a medium-sized plover breeding in Arctic regions. It is a long-distance migrant, with a nearly worldwide coastal distribution when not breeding. The genus name is Latin and means relating to rain, from "pluvia", "rain". It was believed that golden plovers flocked when rain was imminent. The species name " squatarola" is a Latinised version of "Sgatarola", a Venetian name for some kind of plover. They are long with a wingspan of and a weight of (up to in preparation for migration). In spring and