Do robins see worms or hear them? What’s behind that head tilting? Readers’ birding questions answered: robins, wood ducks and cardinal pairs, safe nesting materials and seed gone bad, and more.

Regardless of how robins find worms, it’s always fun to watch the birds play tug of war with a creature just beneath the Earth’s surface.

Robins find worms by sight and hearing, pouncing on and then pulling worms up. The robin is frequently seen running across lawns after earthworms, thus the red, red robin goes bob, bob, bobbing along.