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  1. connorco

    Blackburnian Warbler ? Yucatan, Mexico

    Unless I'm totally making it up, my understanding is that the older birds leave first, and the HY birds normally stick around the breeding grounds longer.
  2. connorco

    Blackburnian Warbler ? Yucatan, Mexico

    Blackburnian is correct. I don't have enough exprience to sex it accurately, however I would guess that it's an adult female due to how bright it is.