Habitat Relations of the Parulidae during Spring Migration

Tins study was designed to evaluate the habitat relations and habitatniche usage of the warblers (Parulidae) in the Raleigh, North Carolina region during the spring migratory period. Although the general pattern of warbler migration has been studied extensively and the timing of first arrivals and peaks established for most species, no detailed studies have been made on habitat associations during migration. This paucity of information appears to be due primarily to the difficulty of measuring populations during migration and to the general belief that birds are much less selective of habitat during migration than in the nesting and winter seasons. Most habitat association studies have been made during the nesting season and in winter when populations are more stable.