From now through November, hawks, harriers, eagles, osprey and other birds of prey are migrating further south from their breeding range. Places such as Cape May, New Jersey and Hawk Mountain in Pennsylvania are well known sites for viewing large numbers of these birds. These species travel during daylight hours along mountain ridges to take advantage of winds associated with weather fronts and updrafts or thermals rising off the mountains to aid them in traveling long distances. Their penchant for traveling during daylight hours may be why many of the species they prey upon choose to migrate at night.
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