This afternoon from 3:45 – 4:30 PM, I watched gulls coming in to roost along the shoreline of the Ottawa River just east of Andrew Haydon Park, at Beltown Park. I observed five Kumlien’s (four first cycle and one second cycle), three Glaucous (one adult and two first cycle) and one first cycle Thayer’s among many Herring and a handful of Great Black-backed Gulls. Most of the gulls were quite close by and availing a nice, long look.
eBird checklist: http://ebird.org/ebird/canada/view/checklist/S32912140
First cycle Thayer’s Gull
First cycle Glaucous Gulls