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.
Garter snake/rat snakes, garden snake, gardener snake, and ribbon snake are some of the common names for the nearly harmless, small to medium-sized snakes belonging to the genus Thamnophis. Endemic to North America, species in the genus Thamnophis can be found from the Subarctic plains of Canada to Central America.