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About 50% of female sea turtles complete "false crawls," which occur when they crawl onto the beach but return to the water without laying eggs.
Many turtles from the same beaches show up at the same feeding areas. Once reaching sexual maturity in the Atlantic Oceans, the female Loggerhead makes the long trip back to her natal beach to lay her eggs. The Loggerhead sea turtle in the North Atlantic cover more than 9,000 miles round trip to lay eggs on the North American shore.
Lizards that lay fewer, but larger eggs are at higher risk for egg binding, and so there is selection pressure towards a minimum clutch size. For example, in common side-blotched lizards , females that lay fewer than the average 4–5 eggs per clutch have significantly increased risk of egg binding.
While most species build nests and lay eggs where they forage, some travel miles. The common snapping turtle walks 5 km (3 mi) on land, while sea turtles travel even further; the leatherback swims some 12,000 km (7,500 mi) to its nesting beaches. [13] [89] Most turtles create a nest for their eggs. Females usually dig a flask-like chamber in ...
A sea turtle clutch. A clutch of eggs is the group of eggs produced by birds, amphibians, or reptiles, often at a single time, particularly those laid in a nest. In birds, destruction of a clutch by predators (or removal by humans, for example the California condor breeding program) results in double-clutching. The technique is used to double ...
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The Arrau turtle (Podocnemis expansa), also known as the South American river turtle, giant South American turtle, giant Amazon River turtle, Arrau sideneck turtle, Amazon River turtle or simply the Arrau, [1] [3] [4] [5] is the largest of the side-neck turtles and the largest freshwater turtle in Latin America. [5]
Hawksbill sea turtle (top right) in a 1904 plate by Ernst Haeckel Linnaeus described the hawksbill sea turtle as Testudo imbricata in 1766, in the 12th edition of his Systema Naturae . [ 4 ] In 1843, Austrian zoologist Leopold Fitzinger moved it into the genus Eretmochelys . [ 5 ]