Species of birds such as the chickadee, sapsucker, grouse and siskin are commonly seen. These birds interbreed with the red-naped sapsucker or yellow-bellied sapsucker where their ranges overlap. Their diet may also occasionally include sugar-rich tree sap taken from sapsucker wells. Bird peck defect, caused by the yellow-bellied sapsucker, is common and serious in nutmeg hickory. Until recently, the red-breasted sapsucker and red-naped sapsucker were considered a single species. "Biskinik", the sapsucker, was known as the newsbird. This flight consists of the sapsucker rapidly flapping its wings below its partner. Sapsucker woodpeckers have a great love of young elm trees. The red-naped sapsucker ("Sphyrapicus nuchalis") is a medium-sized North American woodpecker. The yellow-bellied sapsucker is one of four species in the genus "Sphyrapicus". The red-naped sapsucker is a medium-sized woodpecker, measuring long and weighing . The yellow-bellied sapsucker is found across Canada, eastern Alaska and the northeastern United States. The red-naped sapsucker is distinguished by having a red nape (back of the head). Streaks result from yellow-bellied sapsucker pecking, pin knots, worm holes, and mechanical injuries. The red-naped sapsucker is one of four North American woodpeckers in the genus "Sphyrapicus".