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
Three-banded plover t. bifrontatus" has a grey band between the bill and the white forehead, and the sides of the head are grey. The sexes are similar, and the juveniles of the nominate and Madagascan subspecies also resemble the adults, although the forehead is brownish for a short time. This species is distinguished from the larger, darker Forbes’s plover in that the latter species has a brown forehead and lacks a white wingbar. Three-banded plover The three-banded plover, or three-banded sandplover ("Charadrius tricollaris"), is a small wader. This plover is resident in much of eastern and southern Africa and Madagascar, mainly on