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.
A pit viper is a type of venomous snake. Copperheads, cottonmouths and rattlesnakes are called pit-vipers because they have a pit near each nostril which is highly sensitive to heat. This pit helps the snake in locating warm-blooded prey.estern Diamondback lives in North, Central, South and West Texas. Nine kinds of rattlesnakes are found in Texas, including the massasauga. Rattlesnakes usually rattle before striking, but if they are totally surprised, they may strike before rattling.