Animal behavior. Birds spy on neighbors to choose nest sites.
Jay
J
Withgott
D025041:Animal Migration; D000818:Animals; D000835:Animals, Wild / Q000502:physiology; D001522:Behavior, Animal; D003463:Cues; D004777:Environment; D009425:Nesting Behavior; D012098:Reproduction; D020308:Songbirds / Q000502:physiology*; D013548:Sweden