On the wing, singing at dawn, warblers enter the city each spring. Warblers don't come to bird feeders, they prefer to find their own food. Outbreaks of insects cause influxes of birds which regulate insect populations in the forest. Blue Jays plant nuts and seeds.
Most birds enrich the land by their presence.
In 1914, over 90,000 birds were slaughtered to provide ladies of London with feathers for their hats. Long before concern for dolphins changed the tuna trade, birdwatchers and conservationists raised awareness of the milliners' carnage, and within two decades it was considered by most people unconscionable to wear feathers as before. The Hooded Warbler is among the species that seems to have suffered most from the continuing fragmentation of the great Eastern forests of North America. Hungry and in need of rest, a Yellow-throated Warbler hunts bugs along the water's edge. Blackpoll Warblers are heroic birds in the classical sense.