Care should be taken in separating goshawks from sparrowhawks. In particular, female sparrowhawks often look much larger when they are flying with a slow wing flap, and may be confused with goshawk. The larger female goshawks can be separated from males in the field. Immature birds (See attached photo) are distinguishable from adults by their browner plumage and heavily streaked breasts. Goshawks can breed at one year old.