Thank heavens this was taken at the Houston Zoo, and this rattler was behind glass. He even looks mean! These snakes are so deadly, and if not deadly, they will leave scarring devastation. When in Texas tread lightly in the wild, and always be on the look out.
Albert Moyer, Jr. 
Whoa! Up front and close.
Yes! Thank goodness it was behind glass. Rattlesnakes are BAD news.