Data for Determining Age of Barrow's Goldeneye (Bucephala islandica) from External Characteristics, Alaska and Canada, 2007-2015
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https://www.sciencebase.gov/catalog/item/61a5a42ed34eb622f6974dce
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资源简介：
These data describe an exercise in which known age and sex class of 100 Barrow's goldeneyes (Bucephala islandica), determined by expert examination bursa and plumage, was contrasted with age and sex classes estimated from photos by trained observers.
提供机构：
U.S. Geological Survey
创建时间：
2020-09-21
