1. Yellow-Bellied sapsucker will return to the same tree repeatedly and the new holes are for the most part in line with old holes

2. The yellow-Bellied sapsucker, Sphyrapicus varius, is the only member of the woodpecker family that pecks series of horizontal ¼ inch holes in the bark of trees.These birds have a black crescent on the breast, pale yellow belly, white wing stripe, and a crimson crown

3. Williamson's Sapsucker is a prey species for all three of the Accipiter species of western North America – Sharp-shinned Hawk (A. striatus), Cooper’s Hawk (A. cooperii) and Northern Goshawk (A. gentilis)—with remains found in the pellets of each species in Oregon (Reynolds and Meslow 1983).