Were crocodiles animals from the time of the dinosaurs?

The difference between dinosaurs and crocodiles is divided into five aspects: movement, hair, reproduction, body temperature, and predation, which are as follows:

1. Behavior:

Dinosaurs had limbs located under their abdomen, perpendicular to their abdomen, and walked on four or two legs, even running at a speed of seventy or eighty kilometers per hour. Reptiles such as crocodiles, with their limbs located on their sides, can only crawl (with the exception of a few lizards), with a maximum of 10 kilometers per hour.

2. The hair side is not old:

There were many dinosaurs, especially theropods, that mostly had hair, even fluff or feathers, on their bodies that could glide.

3. Reproduction:

Crocodiles do not have egg-incubating behavior, while some theropod dinosaurs, such as ovivoiraptorosaurs, have egg-incubating habits.

4. Body temperature:

Ovirapiraptorosaurs, and even some long-haired dinosaurs, were homeotherms, while crocodile lizards, etc., were ectotherms.

5. Predation:

The vast majority of dinosaurs were able to capture or tear their prey with their forelimbs, while crocodiles' forelimbs were only used for crawling, not for predation.

In fact, the survival of crocodiles can explain the extinction of dinosaurs and other large creatures to a certain extent, and the biggest difference between crocodiles and dinosaurs is the consumption of energy.

The predatory habit of dinosaurs is to run on land to catch prey, while crocodiles are waiting for their prey to throw themselves into the net, the reason why crocodiles can dive underwater for so long is to reduce their heart rate to a few beats per minute, and well-fed crocodiles can even hibernate for years.

It can be seen from this that the crocodile's metabolism is very slow, in short, it is very anti-hunger, and the crocodile survived when there was a shortage of food, so it has survived until now.

You walk down the street and look back at the dinosaurs on the street and you know what the reason is.

Crocodiles are not dinosaurs.

The crocodile is a vertebrate reptile that is the oldest reptile of the same age as the dinosaurs more than 200 million years ago, and it is also one of the most primitive animals living to date. Crocodiles survive and thrive because of their strong vitality, becoming one of the oldest living "living fossils" on Earth.

Crocodiles usually prefer to inhabit the wetlands of lakes and swamps or in the muddy areas of hills and mountain streams. Crocodiles often give the illusion of being sluggish. Others describe crocodiles as staggering, four-legged, floating, and dragging their tails on the ground instead of crawling forward close to the ground.

1. Crocodiles and dinosaurs are animals of the same era;

2. The crocodile is the earliest and most primitive reptile found alive so far, it evolved from amphibians in the Mesozoic era from the Triassic to the Cretaceous, and it is still a semi-aquatic ferocious reptile to this day;

3. Dinosaurs first appeared in the Triassic of Yekaichan 230 million years ago, and perished at the end of the Cretaceous period that occurred in the late Baisunyan Cretaceous period about 65 million years ago. The extinction of the dinosaurs, whether it is the impact of the environment or its own reasons, is already fossils; The presence of the crocodile is a testament to the power of its life.

Belonging to two different species, the crocodile family champsosauridae is an ancient extinct reptile.

The skull of a crocodile is very similar to that of a lizard, but heavier. Lack of complex stool grinding square bones with subscaly classes. Due to the characteristics of the bibowed reptile biota, the location of Lombactera in the phylaxis is very unclear.

Distinguish from: Baryonychinae crocodile genus Suchomimus Ancient extinct spinosaur reptiles.

The morphology of the dorsal vertebrae of crocodile is similar to that of Diplosaurus, but very different from that of Spinosaurus. The dorsal vertebral nerve spines of Spinosaurus extended more upward. Crocodiles-like dragons have wishbones and are in the shape of a "V".

The shoulder blade has a deep, slightly triangular acromion process. The olecranon process of the ulna is unusually well developed, the length of the forelimbs is significantly shorter than that of the hind limbs, and the hands have well-developed finger claws.