Eurasian Magpie
Pica pica
The adult male of the nominate subspecies, P. p. pica, is 44–46 cm (17–18 in) in length, more than half of which is the tail. Its wingspan is 52–62 cm (20–24 in). The head, neck, breast and vent are glossy black with a metallic green and violet sheen; the belly and scapulars (shoulder feathers) are pure white; the wings are black glossed with green or purple, and the primaries have white inner webs, conspicuous when the wing is open. The graduated tail is black, glossed with green and reddish purple. The legs and bill are black; the iris is dark brown.
ID text from Wikipedia, CC BY-SA 4.0

Yellow-billed Magpie
Pica nuttallii
It is a medium-sized corvid, at 43–54 centimeters (17–21 in) long averaging slightly smaller than the black-billed magpie's 45–60 cm (18–24 in) but overlapping with it. Like other magpies in the genus Pica, it has pied plumage, with black head, back, wings, and tail, and white belly and shoulders. The black feathering, particularly the tail and wing feathers, are glossed iridescent in good light, reflecting variably green, blue, purple, or bronzed, depending on the angle of the light.
ID text from Wikipedia, CC BY-SA 4.0
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