鳄鱼:
Crocodilia welwitschiales (all) of reptiles.Usually the massive,heavy amphibians,appearance and lizards slightly similar,belong to carnivores.Palatal powerful,long conical teeth,there are many short legs,claws,a web.Tail is long and thick thick,with scales.Now about 20 varieties of crocodiles.
The reason is because of its special attention in the evolution history of the existing status,biological and crocodiles are prehistoric dinosaur reptiles is the last link combined.At the same time,the alligator is a bird of existing recently blood.Various alligator fossils have been found,4 mysticetes in three have gone extinct.According to these broad fossil record,may establish alligator and other vertebrates clear relationship between.
乌龟:
The tortoise general life in rivers and lakes and swamps,reservoir and hill,sometimes ashore.In the natural environment,the tortoise with worms,screw,shrimp and feed on fish eat plants,the stem.The tortoise is a variable temperature in winter,animals,or when the temperature is a long-term low circumstances,the tortoise into hibernation,various types of tortoise,began to hibernate temperature is not identical also,but usually in 10 15 degrees Celsius.The tortoise shell in long-term will almost no activities and breathing it,hypothermia,blood circulation and metabolism slows down,the speed of nutrients and consume less.This kind of state and sleep,but it is a similar for several months of deep sleep,and even a mild paralysis.
袋鼠:
Kangaroos are indigenous only Australian mainland and parts of Papua New Guinea.Among them,some species for Australia.All Australian kangaroo,zoo and wild zoo except in the field,life.Different kinds of kangaroo in Australia,different kinds of natural environment of life,from the cool climate forests and desert plains to the tropical region.
The kangaroo is herbivores,eat many plants,some still eat fungi.Most of them in the night,but there are also some activities in the morning or evening activities.Different kinds of kangaroo in different kinds of natural environment.For example,more Lloyd nest to kangaroo and tree kangaroo live in the bushes.A kangaroo like a big rock crack,caves and a shelter.