ABR conducted aerial surveys of the Colville River Delta (CRD), and National Petroleum Reserve–Alaska (NPRA) as part of long-term studies for four focal species: Spectacled Eider, King Eider, Tundra Swan, and Brant. Eiders were counted using standard breeding-pair protocols during pre-nesting aerial surveys. Aerial surveys for Tundra Swans during nesting and brood-rearing also followed standard USFWS protocols and enumerated breeding adults, young, nests, and broods (annual productivity). A single brood-rearing aerial survey for Brant monitored annual brood production and use of coastal salt marshes. Glaucous Gull nests were monitored incidentally during swan and loon surveys conducted for another study. Data on distribution, abundance and habitat selection were used to monitor populations, satisfy technical data requirements of EISs and EAs, apply for permits, and used in manuscripts for publications.