Conowingo Dam supports one of the largest bald eagle populations on the east coast. That population swells in December as migrating eagles find it a good place to rest and fatten up for the journey south. Fish that flow through the dam become disoriented and end up easy catches for the birds and opportunistic fishermen. The birds end up as easy catches for the photographers that flock there as well. The folks come from all over the region and the gear is impressive.