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3-4 years
The Northern Goshawk is a carnivore that mainly preys on birds, mammals, and reptiles. Some of the most common prey hunted by the Northern Goshawk includes snow-shoe hares, red and ground squirrels, and rough, spruced and blue grouse.
the northern goshawk adaptation that i know of is that they fly low and suprise unsispecting prey.
William C. Shuster has written:
'A bibliography on the northern goshawk (Accipiter gentilis)' -- subject(s): Hawks, Bibliography, Goshawk
No..The goshawk is listed as a species of least concern, and may even be extending it's range in the U.S...
Source: Peterson Field Guide To Eastern Birds.