thephotosocietyのインスタグラム(thephotosociety) - 11月26日 11時48分

@Robert Clark
The tail of a saltwater crocodile (Crocodylus porosus)...this species is the largest of all living reptiles, as well as the largest terrestrial and riparian predator in the world. The males of this species can reach sizes up to 6.3 m (20.7 ft) and weigh up (3,000 lb), most adult male saltwater crocodile is generally are between 14 and 17 ft in length and usually resides in mangrove swamps, estuaries, deltas, lagoons, and lower stretches of rivers.
The saltwater crocodile is a ambush predator it is capable of taking almost any animal that enters its territory, including fish, crustaceans, reptiles, birds, mammals, including other predators, and humans.
Crocodylus porosus is believed to have a direct link to similar crocodilians that inhabited the shorelines of the supercontinent Gondwana (which included what is now the Australian continent) as long ago as 98 million years and were survivors of the Cretaceous–Paleogene extinction event. Fossils of Isisfordia, discovered in outback western Queensland (once a vast inland sea) though smaller in size, show attributes of direct lineage suggesting it occupied a similar habitat. The fossil records make it difficult to accurately trace the emergence of the species. The genome was fully sequenced in 2007. The earliest fossil evidence of the species dates to around 4.0-4.5 million years ago & Scientists estimate that C. porosus is an ancient species that could have diverged from 12 to 6 million years ago. Genetic research has unsurprisingly indicated that the saltwater crocodile is related relatively closely to other living species of Asian crocodile.
Other crocodiles also have salt glands that enable them to survive in saltwater, a trait which alligators do not possess. In a similar fashion to migratory birds using thermal columns, saltwater crocodiles use ocean currents to travel long distances. In a study, 20 crocodiles were tagged with satellite transmitters; 8 of these crocodiles ventured out into open ocean, in which one of them travelled 590 km (370 mi) in 25 days. @Robert Clark @thephotosociety @ナショナルジオグラフィック

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