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.
It hunts at night and kills its prey with a potent neurotoxin venom. This venom is the most toxic venom produced by any of North Carolina's venomous snakes, but since Coral snakes are secretive, people seldom encounter one. The other species of venomous snakes are known as pit vipers. The five North Carolina pit vipers include two moccasins (the copperhead and cottonmouth) and three rattlesnakes.