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There are 63 picture matches for 'Turtle'.
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Hawksbill Turtle
Kimbe Bay, Papua New Guinea
Hawksbill Turtle
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More About Turtles ...
Turtles, a generic name for the group of reptiles which includes tortoises and terrapins, are reptiles most of whose body is shielded by a special bony shell developed from their ribs. All extant, or living, turtles are members of the order Testudines, which includes both living and extinct varieties of turtle.

There are two major groups of turtles: sea turtles, which grow to large sizes and live in the oceans in the temperate and tropical regions of the earth, and fresh-water turtles.

Fresh-water turtles which spend the majority of their time on the land are generally called tortoises. In the United Kingdom aquatic fresh-water turtles are known as terrapins. Fresh-water turtles are generally much smaller, ranging in size from a few centimeters to a few feet long. All turtles have a protective shell around their bodies. The top part of their case is called the carapace, the underside is the plastron, and the two are connected by the bridge.

The size of turtles can vary from a few centimetres to up to two meters. Turtles generally live a long time; some individuals are known to have lived longer than 150 years.

The first turtles already existed in the era of the dinosaurs, some 200 million years ago. Turtles are the only surviving branch of the even more ancient clade Anapsida, which includes groups such as the procolophonoids, millerettids and pareiasaurs. All anapsid skulls lack a temporal opening. All other extant amniotes have temporal openings (although in mammals the hole is obscured). Most of the anapsids became extinct in the late Permian period, with the exception of the procolophonoids and the precursors of the testudines (turtles).

Even though they spend large amounts of their lives underwater, turtles are air-breathing reptiles, and must surface at regular intervals to refill their lungs with fresh air. They also spend part of their lives on dry land. Sea turtles lay their eggs on dry sandy beaches, and are highly endangered largely as a result of beach development and over hunting.

Aquatic respiration in Australian freshwater turtles is currently being studied. Some species have large cloacal cavities that are lined with many finger-like projections. These projections, called "papillae", have a rich blood supply, and serve to increase the surface area of the cloaca. The turtles can take up dissolved oxygen from the water using these papillae, in much the same way that fish use gills to respire.
Taxonmony
Phylum: Chordata
Class: Reptilia
Order: Testudines
Family:
Source: Wikipedia Read more about Turtles
PICTURES (Click to enlarge)
Turtle picture Olive ridley turtle picture Turtle picture
Turtle Olive ridley turtle Turtle
Hawksbill Turtle picture Turtle picture Bog Turtle picture
Hawksbill Turtle Turtle Bog Turtle
Soft-shelled Turtle picture Hawksbill Turtle picture Hawksbill Turtle picture
Soft-shelled Turtle Hawksbill Turtle Hawksbill Turtle
Eastern painted turtle picture Eastern box turtle picture Painted turtle picture
Eastern painted turtle Eastern box turtle Painted turtle
Turtle picture Plymouth Red-bellied Turtle picture Turtle picture
Turtle Plymouth Red-bellied Turtle Turtle
Western Painted Turtle picture Hawksbill Turtle picture Western Pond Turtle picture
Western Painted Turtle Hawksbill Turtle Western Pond Turtle
Green turtle picture Eastern painted turtle picture Common snapping turtle picture
Green turtle Eastern painted turtle Common snapping turtle
Wood turtle picture Eastern box turtle picture Eastern box turtle picture
Wood turtle Eastern box turtle Eastern box turtle
Eastern box turtle picture Eastern painted turtle picture Eastern painted turtle picture
Eastern box turtle Eastern painted turtle Eastern painted turtle
Mud turtle picture Musk Turtle picture Musk Turtle picture
Mud turtle Musk Turtle Musk Turtle
Spotted turtle picture Spotted turtle picture Common snapping turtle picture
Spotted turtle Spotted turtle Common snapping turtle
Spotted turtle picture Snapping turtle picture Sepik turtle picture
Spotted turtle Snapping turtle Sepik turtle
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