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
Oriental plover Oriental plover The oriental plover ("Charadrius veredus") also known as the oriental dotterel, is a medium-sized Charadriine plover closely related to the Caspian plover. It breeds in parts of Mongolia and China, migrating southwards each year to spend its non-breeding season in Indonesia, New Guinea and northern Australia. Adult male in breeding plumage: white face, throat and fore-crown; grey-brown hind-crown, hind-neck and back; belly white, demarcated with narrow black band and then broad chestnut breast band merging into white throat. Female, juvenile and non-breeding male: generally grey-brown upperparts and white belly; pale face with white streak above eye. Measurements: length