Black-billed Magpie
Pica hudsonia
The black-billed magpie is an unmistakable bird within its range. It is a medium-sized bird that measures 45–60 cm (18–24 in) from tip to tail. It is largely black, with white scapulars, belly, and primaries, and the wings and tail are an iridescent blue-green. The tail is made up of long, layered feathers, the middle pair of which extend further than the rest. The beak is uniformly black, oblong, and weakly curved toward the tip. Adults also have black irises. Voice: The vocalizations of the black-billed magpie consist of a number of calls variously described as tweets, coos, purrs, shrills and squawks, but the most common is an alarm call, called a chatter, that is described as a ka-ka-ka-ka, sometimes preceded with a skah-skah. This call is very different from that of the Eurasian magpie, but is similar to that of the yellow-billed magpie.
ID text from Wikipedia, CC BY-SA 4.0
Oriental Magpie
Pica serica
It is 45 cm long. Compared to the Eurasian magpie, it is slightly smaller, with a proportionally shorter tail and longer bill and tarsi (lower legs), and darker with less white in the plumage. The back, tail, and particularly the remiges show (according to source) either bluer, less green iridescence compared to Eurasian magpie, or conversely, more green. The rump plumage is mostly black, with narrow, often greyish-white band, which connects the white shoulder patches as in its relatives. The Oriental magpie has the same call as the Eurasian magpie, though somewhat softer.
ID text from Wikipedia, CC BY-SA 4.0
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