During the fall and spring months many birds migrate along the river valley. More than 30 species of warblers have been recorded during spring migration. In the fall the Kittatinny Ridge provides an important migratory corridor for raptors. The Delaware River valley offers important wintering habitat for a large population of bald eagles attracted to the open water for foraging. Golden eagles are less frequently sighted but are recorded nearly every winter. Bald eagles are frequently seen along the river during the summer months and in 2002 the first recorded successful nest in the recreation area fledged two young. In April of 2003 the Minsi Cliffs in Pennsylvania at the Water Gap were the site of a peregrine falcon nest, the first peregrine nest in this areas since the 1940s and 1950s.
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