Chinese name
hamster
scientific name
gryllidae
Another name
Hamster, hamster
boundary
animal kingdom
door
Chordata
summary
mammal
eye
Rodentia
The branch of academic or vocational research.
Mouse family
subfamily
Hamster subfamily
English
hamster
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Basic introduction
Each hamster has a pair of growing incisors and three pairs of molars, and the tooth type is 1 0 0 3, which is a staggered triangle. Molar teeth can grow for a lifetime with or without roots. It was first introduced from Japan to study teeth, then kept as a pet, and then spread all over the world.
hamster
All kinds of animals in Carnivora basically belong to small and medium-sized rodents. The body length is between 5-28 cm and the weight is between 30- 1000 g. Short and thick. The tail is short, generally less than 1 cm, and some species are shorter (such as China hamster) or less than half the length of hind legs, or even almost invisible. The main food is plant seeds, I like nuts, I also eat tender stems or leaves of plants, and occasionally I eat bugs. Most people don't hibernate and live by storing food in winter. A few species will enter an inactive quasi-hibernation state when the weather is cold (usually called "pseudo-hibernation", if they enter pseudo-hibernation, they should be rescued quickly, otherwise the hamster will die)! Hamsters are mainly active at night, and their eyesight is poor, so they can only blur their shapes. Colors can only distinguish between black and white. The coat color is complicated.
Some kinds of hamsters have become popular pets in recent years because they are close to people, such as Syrian hamster (commonly known as golden hamster), Gakaria hamster (commonly known as third line), Campbell dwarf hamster (commonly known as first line, Mongolian hamster or Russian hamster), Roborovski hamster (commonly known as in-laws, deer leopard) and so on.
The hamster was discovered by 1829 in a city near Siberia. They belong to rodents, and their scientific name is Rodentia, which comes from Latin, meaning to bite, which means that teeth are constantly growing and need to be ground. Hamsters belong to the family Carnivora, and then they are divided into several categories: middle hamster, big hamster, small hamster and thick-shelled hamster. China hamster belongs to the genus Hamster; ; Syrian hamster (golden mouse, golden bear) belongs to middle hamster; Campbell I of Campbell, Phodopus sungorus of Gacaglia (Little Grey Tiger, Little Silver Fox, Little Purple King) and Phodopus roborovskii of Xiaolubao are all hairy feet.
Appearance characteristics
The most common coat color of hamster is white from cheek to abdomen and brown on the back, but there are also spots formed by dark brown, and the coat color is mostly gray, and then a variety of breeds such as gold, mottled and even long hair are cultivated. All kinds of hamsters look similar, but their body shape and coat color are slightly different, and their personalities are similar. Among them, Roborowski mouse is the smallest kind of Dowav hamster, which is quick and timid, and its back color will change from black to brown during the growing period. Hamster is one of the lovely pets, so many children or women will put it down when they see this "live hair doll".
Hamsters are 5- 12 cm long and have skin on their cheeks. There are a pair of sharp front teeth in the upper and lower jaws. The hair on the back of the body is generally fawn or brownish yellow, and the ventral, forelimbs and hind limbs are black. There are 3 white or light yellowish spots on the front end of the body. The feet are white and slightly yellow. Unlike mice, they only have a short tail, or even no tail.
Except for China hamster, the tails of other hamsters are less than one centimeter. The most interesting thing about hamsters is that they know how to hide food on both sides of their cheeks and then spit it out in a safe place, so some people call them hamsters with big cheeks. The name hamster comes from German. Hamstern, this means storage.
sexism
Hamsters can simply distinguish between males and females:
The buttocks of male hamsters are generally large and red;
Female hamster's buttocks are generally inverted triangle, and the anus is small and closed. Individuals can see circular objects.
The distinction between male and female rats is mainly judged by the distance between anus and reproductive organs. The distance between genitals and anus of female rats is relatively close, while the distance between genitals and anus of male rats is relatively wide. In addition, mature male rats will have prominent testicles and penises, which will be very obvious for golden mice, gerbils and macaroni mice, but not for maple mice. But most people start with mice, which are difficult to distinguish because their sex organs are not so obvious. Here is a convenient method: male rats have hair between their genitals and anus because they are far away; Because the little mouse is close, there will be no hair between two o'clock. As long as it is carefully identified, it can still be correctly identified under normal circumstances.