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
Thick-billed Longspur
Rhynchophanes mccownii
The thick-billed longspur is about 15 cm (5.9 in) long, has a wingspan of 28 cm (11 in) and weighs around 25 g (0.88 oz). It has a large cone-shaped bill, a streaked back, a rust-coloured shoulder and a white tail with a dark tip. In breeding plumage, the male has a white throat and underparts, a grey face and nape and a black crown. Breeding females are largely gray, with a pale bill and rusty tinged median coverts and scapulars. Non-breeding males are similar to females but with crowns spotted rather than streaked, and more chestnut on their median coverts and scapulars.
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 Thick-billed Longspur.