While monitoring songbird nests using video cameras in May 2005, we documented a woodrat (Neotoma) depredating an adult female and nestling yellow-eyed junco (Junco phaeonotus) in the Santa Catalina Mountains, Arizona. Based on elevation (2,750 m) and the forest type surrounding the depredated nest, we believe that the woodrat was probably N. mexicana (although we cannot exclude N. albigula). Woodrats are considered herbivorous and have never been observed depredating vertebrate prey. This observation demonstrates that woodrats have greater dietary plasticity than previously thought.