[nysbirds-l] Possible Thayer's Gull at Inwood Hill Park, northern Manhattan, NYC

Yesterday on the Inwood Hill park part of the Lower Hudson CBC, Alan Messer found and photographed an immature gull on the pier at the end of Dyckman Street on the Hudson River in upper Manhattan. The bird intrigued Alan and after consulting some references last night he sent me some photos

[nysbirds-l] Possible Thayer's Gull at Inwood Hill Park, northern Manhattan, NYC

Yesterday on the Inwood Hill park part of the Lower Hudson CBC, Alan Messer found and photographed an immature gull on the pier at the end of Dyckman Street on the Hudson River in upper Manhattan. The bird intrigued Alan and after consulting some references last night he sent me some photos