Climate change. Early birds may miss the worms.
Pennisi
E
E
D000222:Adaptation, Physiological; D000818:Animals; D002980:Climate; D004734:Energy Metabolism; D005260:Female; D005502:Food; D005602:France; D008297:Male; D009425:Nesting Behavior; D012098:Reproduction; D012621:Seasons; D020308:Songbirds / Q000502:physiology*