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Yes, rattlesnakes are multi-cellular.
Rattlesnakes have 2 eyes, one on either side of the head.
Rattlesnakes live in both Americas, from Canada to Argentina.
The northern Pacific rattlesnake (Crotalus oreganus oreganus) is found in British Columbia.
Rattlesnakes have three principal layers of skin - the epidermis, the dermis and the hypodermis. Each layer may be subdivided into additional layers.
There is no certain amount of how many rattlesnakes are born at one time, but the average amount of rattlesnakes born at one time is usually less than 15, and around 10 or 12.
Normally, unless mating or competing for mates, they ignore each other totally.
'Teenage' rattlesnakes, if there is such a thing, are just slightly smaller versions of adult rattlesnakes. They look the same as an adult and each one is well equipped with fangs and venom and they know well how to use them. Since rattlesnakes receive no parental care and are on their own from the moment of birth, they are born 'streetwise' and not to be provoked.
There do not have the same number in each country
Snakes can have between 130-500 vertebrae, with ribsattached to each one.
Rattlesnakes are called rattlesnakes in the desert and elsewhere.
There are a number of desert rattlesnake species and each has a distinctive appearance. Pictured above is a sidewinder rattlesnake, a desert species. All rattlesnakes have a similar appearance.