Urban crows rob rooftop nests of Common Nighthawk

Research by Steven Latta, Director of Conservation and Field Research at the National Aviary and Krista Latta

Carry-over effects provide linkages across the annual cycle of a Neotropical migratory bird. By Dr. Steve Latta

This ground-breaking National Aviary study of hormone levels in feathers of a migratory bird reveals that energy stress during the breeding season has significant “carry-over” effects: stressed birds occupy lower quality winter territories, have poorer body condition, and experience reduced annual survival.