Hawks are a group of medium-sized diurnal birds of prey of the family Accipitridae which are widely distributed and varying greatly in size. The subfamily Accipitrinae includes goshawks, sparrowhawks, the sharp-shinned hawk and others. These are mainly woodland birds with long tails and high visual acuity, hunting by sudden dashes from a concealed perch. In the Americas, members of the Buteo group are also called hawks; these are called buzzards in other parts of the world. Generally buteos have broad wings and sturdy builds. They are relatively larger winged, shorter-tailed and soar more extensively in open areas than accipiters, descending or pouncing on their prey rather than making fast horizontal pursuit.