Summering and breeding records of Bonaparte's gull near Biggar, SK

On 12 June 1998, I (WER) noticed a small flock of swans resting on the far shore of the northern tip of Richmond Lake, 4 km sw of Biggar. On a hunch that they might be Trumpeters, I stopped and approached slowly on foot. At 150 m, they took flight, and with them, two adult Bonaparte’s Gulls flushed and began foraging over the marsh. After diving and feeding in a leisurely fashion at distances as close as 10 m for approximately 20 minutes, one gull circled upwards, flew southeast across a shrubcovered peninsula and disappeared from view over Richmond Lake.