Nile crocodile stability and additional weight to sink in water, this bearing great probability over the theories that they assist in digestion and staving off hunger. However, Alderton (1998) stated that a study using radiology found that gastroliths were seen to internally aid the grinding of food during digestion for a small Nile crocodile. Herodotus claimed that Nile crocodiles have a symbiotic relationship with certain birds, such as the Egyptian plover ("Pluvianus aegyptius"), which enter the crocodile's mouth and pick leeches feeding on the crocodile's blood, but no evidence of this interaction actually occurring in any crocodile species has been found, and
Kentish plover unsustainable harvesting and urbanisation can destroy nesting sites. Plover populations can also be affected by rural human activity, for example fishermen walking through protected plover breeding sites, bringing large numbers of dogs with them- a known predator of plover eggs. Natural predators are also a problem, as many of these predators appear to thrive unnaturally well in the presence of plover breeding grounds, such as the brown-necked raven (Corvus ruficollis) in Maio, Cape Verde, the White-tailed Mongoose (Ichneumia albicauda) in Saudi Arabia, and the Grey Monitors (Varanus griseus) in Al Wathba Wetland Reserve. It is thought that the high amount