Chestnut-collared Longspur
Calcarius ornatus
These birds have a short conical bill, a streaked back and a white tail with a dark tip. In breeding plumage, the male has black underparts, a chestnut nape, a yellow throat and a black crown. Other birds have light brown underparts, a dark crown, brown wings and may have some chestnut on the nape. Measurements: Length: 5.1–6.5 in (13–16.5 cm) Weight: 0.6–0.8 oz (17–23 g) Wingspan: 25–27 cm
ID text from Wikipedia, CC BY-SA 4.0
Smith's Longspur
Calcarius pictus
These birds have short cone-shaped bills, streaked backs, and dark tails with white outer rectrices. In breeding state plumage (mostly formed by worn basic plumage), the male has a pumpkin-orange throat, nape, and underparts contrasting with an intricate black-and-white face pattern. The white lesser coverts are quite pronounced on a male in spring and early summer. Females and immatures have lightly streaked buffy underparts, dark crowns, brown wings with less obvious white lesser coverts, and a light-colored face. The tail is identical at all ages.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Chestnut-collared Longspur and Smith's Longspur.