Black Rat Snake (Elaphe obsoleta obsoleta) at Bird Feeder
Black Rat Snakes are notoriously ingenious at climbing trees to raid bird's nests. This series of photos shows one snake's efforts to turn bird feeders into snake feeders!
David DiGiuseppe and Nina Frankel documented this enterprising Rat Snake's exploration of their bird feeders near Chapel Hill, NC on May 18, 2006.
See Black Rat Snake for some photos of other Rat Snakes.
This must be the most decorative rat snake I've ever seen!