Gulls and Terns

adult non breeding: non breeding adult, ring-billed gull: Larus delawarensis, winter plumage: winter-plumaged, Rideau River

AvesBirdsBirds of North AmericaCharadriiformesGulls LaridaeLarinaeLocationsOntarioOttawaRideau Riveradult non breeding non breeding adultadultsalternate plumageplumageringbilled gull Larus delawarensiswinter plumage winterplumaged