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  1. Common Goldeneye Bucephala clangula
    ML188158431 eBird记录 S61504246 报告
    Common Goldeneye - ML188158431
    条评分 4
    2 条评分
    Boulder, Colorado, United States
  2. Cackling Goose Branta hutchinsii
    ML188158421 eBird记录 S61504246 报告
    Cackling Goose - ML188158421
    条评分 3
    1 条评分
    Boulder, Colorado, United States
    媒体文件注释 Darker bird in middle. Perhaps just a variant Richardson's.
  3. Cackling Goose Branta hutchinsii
    ML188158391 eBird记录 S61504246 报告
    Cackling Goose - ML188158391
    条评分 3
    1 条评分
    Boulder, Colorado, United States
    媒体文件注释 Probably a variant Richardson's but noticeably darker with a strong gular stripe…
  4. Cackling Goose Branta hutchinsii
    ML188158371 eBird记录 S61504246 报告
    Cackling Goose - ML188158371
    条评分 4
    5 条评分
    Boulder, Colorado, United States
    媒体文件注释 Smaller, stubbier, and darker than the Richardson's suggesting minima, but perha…
  5. Cackling Goose (Richardson's) Branta hutchinsii hutchinsii
    ML188158341 eBird记录 S61504246 报告
    Cackling Goose (Richardson's) - ML188158341
    条评分 4
    3 条评分
    Boulder, Colorado, United States