Black-billed magpie
Black-billed magpie, near St. Thomas, Ontario, July 30, 2023. Very far away, heavily cropped and processed. Saw 5 of the possible 6 in the area. Unusual visitor this far east. Pica hudsonia. The Black-billed Magpie makes a very large nest that can take up to 40 days to construct. It's a lot of work, but a study found that it only used about 1% of the daily energy expenditure of the pair. Laying eggs, on the other hand, takes 23% of the female's daily energy budget. source -Cornell Lab of Ornithology