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.
For your safety, know these 4 poisonous (venomous) snakes, and what they look like â to avoid being bitten by one. There are thousands of types (species) of snakes in the world, while more than one hundred species are found in North America â and some of them are poisonous (venomous). The poisonous (venomous) snakes of North America fall into two groups: Coral Snakes and Pit Vipers (which include Rattlesnakes, Cottonmouth, & Copperhead)