This news is a shame. I wasn't overly impressed by Philadelphia Zoo when I visited, but one real highlight was the reptile house, which is saying something since reptile houses aren't usually my cup of tea. I was especially impressed with the diversity of rattlesnake species the zoo had on display. It'll be a big loss if these snakes are no longer kept by the zoo, although their could be an upside to this: we don't know what the zoo is planning to replace the venomous snakes with.