Bonaparte’s gulls

Adult Bonaparte's gull in full breeding plumage

Adult Bonaparte’s gull in full breeding plumage

April 19, 2018 – Good size flocks of Bonaparte’s gulls have been reported in Kankakee county and throughout Northern Illinois in recent weeks as they are working their way north to the boreal forests of western and central Canada and the southern half of Alaska where they will nest in the conifers. The small gulls prefer trees separated from the dense growth that are at the edges of marshes and bogs. A flock of 50 of these small and elegant tern like gulls was spotted in a flooded area of an agricultural field busily feeding on insects and worms, certainly to bulk up for their long journey north. The winter plumage of these gulls is mostly white, with a light gray on the tops of their wings and black wingtips, plus a dark spot on the sides of the head behind the eye. During the nesting season the adult birds’ head transitions to a slaty black as they get that wonderful dark hood that stands out in a beautiful contrast to their white body. This flock was made up of adult birds in full breeding plumage with some that were at different stages of transition, plus a number first year birds.

Bonaparte's gull not in breeding plumage

Bonaparte’s gull not in breeding plumage

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