However even 18 hours is not considered abnormal for a Chihuahua. This includes naps.There are 2 types of sleeping. One is a lighter sleep (called slow wave) and the other is the deeper sleep (known as REM-Rapid Eye Movement). Dogs, just like humans do have these 2 different types of sleep.
Probably the best known snake in the world, the Rattlesnake is a pit viper found almost everywhere in the United States, and is capable of a deadly bite. Its trademark rattle strikes fear into anyone who hears it.
1 If a snake has a true rattle on the end of itâs tail, itâs a Rattlesnake â venomous! 2  Some venomous snake in the US will have a small depression on their faces between their nostrils and their eyes called a âpitâ which is used to sense the heat of their prey.3  These snakes are known as pit vipers. The Coral snake, being so small, makes this hard to spot. 2  If a snake has a true rattle on the end of itâs tail, itâs a Rattlesnake â venomous! 3  Some venomous snake in the US will have a small depression on their faces between their nostrils and their eyes called a âpitâ which is used to sense the heat of their prey.