10X POSTCARD SEND MORE TOURISTS RATTLESNAKE Rattlesnakes are one of the four snakes found in the U.S. whose venomous bite can be fatal to humans. Rattlesnakes come in 16 different varieties. There are numerous subspecies and color variations, but they are all positively identified by the jointed rattles on the tail. Photo: Bill Draker/KAC Productions Postcard size 4 x 6