Importance of the 2014 Colorado River Delta pulse flow for migratory songbirds: Insights from foraging behavior

•Migrant songbirds foraged at higher rates in mesquite in 2000 and in willow in 2014.•Migrants used predominantly mesquite in 2000 and willow in 2014.•Wilson’s warbler foraged more efficiently in willow than in other tree species.•Pulse flows may improve stopover habitat for spring migrant songbirds...

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