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.
Pit Vipers get their name from heat-sensitive pits found on each side of the face. Five of Florida's venomous snakes are pit vipers, but only three of them are found throughout the state. The Timber Rattlesnake (also known as the Canebrake Rattlesnake) and the Copperhead are only found in certain areas of northern Florida.