Commentator, author and bird lover Julie Zickefoose provides an update on the birds of spring — and how they fared during an unseasonable cold snap a few weeks ago, when temperatures dropped to the 20s at night and 30s by day at her home in Whipple, Ohio.

Zickefoose was concerned that the migratory birds might not be able to find enough food during the cold spell.

But she tells Melissa Block that the birds stayed put down south — and followed the re-emerging leaves north. The birds are arriving now in one great front, albeit later than usual.

She discusses the many birds she has spotted and photographed in recent days, including the blue-winged warbler, and shares a sad story with a happy ending about a bluebird nest on her property.