Interactions Between Double-crested Cormorants and Herring Gulls at a Shared Breeding Site

The Double-crested Cormorant (Phalacrocorax auritus) population in the North American Great Lakes region has increased substantially during the past three decades. Cormorants are likely recovering after a period of human-caused suppression; however, their resurgence has raised concerns regarding potential negative interactions with other waterbirds. To examine this issue, we compared measures of nesting success and aggressive behavior in …