Last year, a zoo in Anhui Province gave Yangzi crocodiles snow cakes to make it fire, and finally caught fire lonely, attracting many terrier little sunspots to mislead the rumor-mongering brainwashing masses, saying that Yangzi crocodiles have low combat effectiveness and can't beat geese, and people can easily subdue them with their bare hands, resulting in many people now think that this is a Yangzi crocodile no matter what kind of crocodile they see.
Alligator
There are about 26 extant members of the order Crocodyliformes , divided into three families , tuo , and fish-eating crocodiles and eucrocodiles , and three families are recognizable from appearance. In fact, the three of them are not too closely related, let's look at the characteristics of the Nymphalidae family (the mouth is wide without revealing the tooth neck shield and the head is as wide as the toilet lid), so they are also called alligators, and the fish-eating crocodiles are characterized by long and thin mouths. The true crocodile family is characterized by the following fourth tooth exposed, the neck shield is not connected, and from the above characteristics, you can probably see what family the Yangzi crocodile is, yes, it is the Crocodile family, there are eight members of the Crocodile family, divided into the subfamily Nymphalinae and the Caiman subfamily, there are two subfamilies of the Crocodile are the Yangzi crocodile and the American alligator / Dense River crocodile,
The two Yangzi crocodiles above and the two dense river crocodiles below, the toilet lid head only shows the upper teeth but not the lower teeth, and the neck shield is connected (the row of small thorns on the back of the head is connected all the way to the tail)
The caiman subfamily is Paraguay, and spectacled caimans (Paraguayan caimans and spectacled caimans are one of the goods that tends to appear in documentaries to be preyed upon by jaguars) bottlenose caimans and black caimans
It can be seen that there are orbits and no dark spots on the mouth, so this is spectacled caimans preyed on by jaguars
1 spectacled caiman 2 Paraguayan caiman 3 bottlenose caiman 4 black caiman
We can look at the feature 1 is the glasses caiman crocodile, it has a small angular angle above the eyes hence the name, then 2 Paraguayan caimans also have "glasses" how to distinguish it from 1, you can look at the mouth, Paraguayan caiman mouth has some dark spots, which is glasses caiman does not have, 3 bottlenose caiman head like a small bread is rectangular is not as flat as other crocodiles, 4 black caiman body is black, of course it is a black crocodile genus is not a real caiman .
There are also shield-kissed ancient crocodiles and cone-kissed ancient crocodiles, of which shield-nosed ancient crocodiles are the smallest existing crocodiles, only 1.2 meters and 15 kilograms, and the Yangzi crocodile is mostly large in front of it.
The upper shield kisses the ancient crocodile, the lower cone kisses Cuba, the shield kisses Cuba, the mouth is short, the nose is slightly upturned, and the back of the head is thorny, the cone kiss has a long mouth and a flat nose, and the back of the head is relatively flat
There are two members of the fish-eating crocodile family, namely the Ganges/gharial crocodile and the Malay crocodile.
Above the Ganges crocodile, below the Malay crocodile
It can be seen that the mouth of the Ganges crocodile is much thinner and the color is earthy gray, and the distance between the eyes is relatively wider, while the Malay crocodile mouth is thicker than the Ganges crocodile, the eyes are next to each other, and the body is brown.
The remaining 16 species are members of the true crocodile family, including the largest Gulf crocodile and hippopotamus Nile crocodile living together, or Siamese crocodile as a meat value in this family.
Above is the Siamese crocodile (a crocodile used to eat) and below is the Gulf crocodile, all members of the true crocodile family
You can see the characteristics of the true crocodile family, the fourth lower tooth below is exposed, the neck shield scales (the scales behind the back of the head) are not connected, you can see that the back of its head is a protruding piece and then has another protruding piece, if you don't understand, you can see that the back of the head of the Crocoidae just now will not be bald.
So is the Yangzi crocodile as vulnerable as rumors on the Internet, obviously not, although the bite force of the Yangzi crocodile is not as exaggerated as the 800 kilograms uploaded on the Internet, but the skull hardware is also among the best in the same type of crocodile, its main food is field snails and mussels, occasionally catching fish or hares crossing the river and sneaking up on water birds for a living. If it bites a broken palm must be very easy, after all, professional snails, generations of dealing with these hard objects, then Yangzi crocodile really can't beat the goose, obviously this is also impossible, the fight between the Yangzi crocodile and the goose This is no longer a problem of fighting, this is a problem of unilateral predation of the Yangzi crocodile. So eat snow cakes, in fact, crocodiles as a master of sneak attacks, they often show their eyes on the surface of the water to observe the situation outside, Yangzi crocodiles are no exception, and snow cakes are thrown in front of it mistaken for prey will eat, even if you give four or five meters long bay crocodile Nile crocodile throw a slippers it will bite or even eat, can you say that large crocodiles like to eat crocodiles, in fact, Yangzi crocodiles can not digest starchy food at all, long-term eating of this type of food will only lead to organ failure, civilized feeding, play terriers to be moderate! Of course, the size of the crocodile represents combat effectiveness, and crocodile tigers over 3.8 meters have to be weighed, and the reason why two kinds of caimans are preyed on by jaguars is because they are too small, only 20 kilograms, smaller than the Yangzi crocodile. Will you distinguish crocodiles, according to the characteristics in the picture, let me examine you, which family is this crocodile below?