European starlings, an invasive species in the U.S., lay blue eggs often mistaken for those of bluebirds or robins. Unlike native birds, starlings outcompete local species and are not protected by law ...

The house sparrow is a highly invasive pest in North Carolina, and bluebird enthusiasts frequently throw their eggs out and remove their nests to keep them from overtaking the nestboxes that bluebirds ...

DEAR JOAN: What is the right time to remove a nest from a nest box after the nestlings have fledged? I removed an abandoned nest last year that had four unhatched bluebird eggs. A new family built a ...