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Northwestern (or Pacific) Western Meadowlark. Notice the central rectrices 1-3 are more similar to Eastern Meadowlark than that of nominate Western Meadowlark (Sturnella neglecta neglecta).

References:
https://sora.unm.edu/sites/default/files/journals/auk/v034n01/p0068-p0070.pdf (Rathbun 1917, The Auk, pages 68-70)

http://www.sandiegobirding.com/?p=1384