A slow day today at Conowingo Dam. Only three species of gulls. Low numbers of other birds. Details below. Date: Friday, February 13, 1998. Time: 0900-1500 Weather: sunny, AM low 40, PM high 45 Power Generation: Full, all day Observers: Gene Scarpulla & Rick Blom GREAT BLUE HERON 42 (There were pairs present at the nests on the Cecil County side of the river) American Black Duck 4 Black Vulture 12 Turkey Vulture 10 Bald Eagle 6 (immature) PEREGRINE FALCON 1 (immature, observed catching and carrying off a Rock Dove) Ring-billed Gull 150 Herring Gull 150 Great Black-backed Gull 50 Rock Dove 110 crow sp. 3