Northern Goshawk (Accipiter gentilis), a Federal Species of Concern, prefers mature deciduous, coniferous, or mixed forest types found in the northern 2/3 of Wisconsin. The are also know to nest in pine plantations in lower percentages, especially in the central part of the state. Breeding pairs typically choose a mature, closed canopy forest with large diameter trees for nesting and foraging. Territorial adults are known to be very aggressive towards humans that come within a half-mile or more of an active nest during most stages of the breeding season. One to five nests are common within a stand and are built just below the canopy in the upper portion of the nest tree. The recommended avoidance period for this species is March 20 - July 31. See the species guidance document for avoidance measures and management guidance from the Natural Heritage Conservation Program.