Red-Bellied Woodpecker By It's Hole

Why Birds Need Dead Trees

The Forest Service’s own case for leaving a snag standing — which birds depend on dead wood, and the per-acre snag numbers land managers were told to keep.

geese migrate at night

How Scientists Track Migrating Birds

The working methods for tracking bird migration — counting silhouettes against the moon, bands, radio transmitters lighter than a penny, and radar ‘angels’ — each with its stated blind spot.

Pileated Woodpecker Nest in Florida

Which Woodpecker Drilled That Hole?

Entrance-hole sizes, nest heights, and preferred trees for the woodpeckers most likely to have made the cavity in your tree, straight from two federal handbooks.

Rose-Breasted Grosbeak

Spring Migration Birds to Watch For

Watch spring passage migrants at a roadside marsh long enough and a pattern becomes clear. Barn Swallows skim the water, sandpipers probe exposed mudflats…