Large Aldabran tortoise (60–80 cm [24–32 inches]) lays 12–14 eggs
Common snapping turtle (20–35 cm [8–14 inches]) lays 20–30 eggs
Suwanee cooter (14–28 cm [5.5–11 inches]) lays 15–20 eggs
Generally eggs are laid annually; a few species lay every other year, and some lay twice in one nesting season. The sea turtles generally nest in 3-4 year cycles, the female usually laying multiple clutches of eggs during each nesting season
Adult turtles typically eat aquatic plants, invertebrates, insects, snails, worms; and occasionally eat dead marine animals.
Freshwater species are carnivorous, eating small fish and a wide range of aquatic life.
Protein is essential to turtle growth and juvenile turtles are purely carnivorous
Lower Classifications. Turtles are divided into two extant suborders: Cryptodira and Pleurodira.
Cryptodira is the larger of the two groups and includes all the Sea turtles, the terrestrial tortoises, and many of the freshwater turtles
The vast majority of the 350 or so species of turtles and tortoises are “cryptodires,” meaning these reptiles retract their heads straight back into their shells when threatened
The rest are “pleurodires,” or side-necked turtles, which fold their necks to one side when retracting their heads
Shell of cryptodires are composed of 12 bony plates, while pleurodires have 13, and also have narrower vertebrae in their necks
Pleurodire turtles are restricted to the southern hemisphere, including Africa, South America, and Australia.
Cryptodires have a worldwide distribution and account for most familiar turtle and tortoise species
Famous Aquatic and Terrestrial types of turtles is given below
Arrau (Podocnemis expansa)
Asian box turtles (family Geomydidae)
Blanding’s turtle (Emydoidea blandingii)
Chicken turtle (Deirochelys reticularia)
Mud turtles and musk turtles (family Kinosternidae)
North American box turtles (genus Terrapene)
Painted turtle (Chrysemys picta)
Pitted shell turtle (Carettochelys insculpta)
Pond turtles (families Emydidae and Bataguridae; most species aquatic)
Sea turtles (families Dermochelyidae and Cheloniidae)
Side-necked turtles (familes Chelidae, Pelomedusidae, and Podocnemididae)