Bird Watching: Say Ahhh!, 1 by Grasmussen

Grasmussen wrote:
The home I lived in as a teenager usually had two or three Chipping Sparrow nests, every year, in the small evergreen trees used to landscape the yard. On one occasion I observed a Cowbird egg laid in a Chipping Sparrow nest when the construction had just started. The sparrow continued construction untill the egg was nearly covered with nesting material. At that point I removed the parasitic egg.

This is a picture of the very rare Kirtland's Warbler nest with three warbler eggs, and one parasitic egg of a Cowbird. Photographed June 1967, Kalkaska County, MI.
Gary