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.
Halyâs and Himalayan pit vipers are small snakes, with a total length around 90-100. cm long. The color of the skin varies from gray, brown to red, dark green or even. black. The pit vipers are generally considered to be the most advanced family. of snakes since they possess a very sophisticated venom delivery system.