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
European golden plover European golden plover The European golden plover ("Pluvialis apricaria"), also known as the Eurasian golden plover or just the golden plover within Europe, is a largish plover. This species is similar to two other golden plovers: the American golden plover, "Pluvialis dominica", and Pacific golden plover, "Pluvialis fulva", which are both smaller, slimmer and relatively longer-legged than European golden plover, and both have grey rather than white axillary feathers (only properly visible in flight). 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