{"version":"1.0","type":"link","title":"Field mark - Newikis","description":"A field mark is a characteristic (e.g. in plumage) useful for species identification, usually birds. They are often used in field guides or identification keys. Field marks generally refer to distinct diagnostic differences in plumage. In a broader context, a field mark might be referred to as a…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://upload.wikimedia.org/wikipedia/commons/d/d0/Black-capped_Vireo-Kerr_WMA-TX_-_2015-05-24at12-50-582_%2821583009156%29.jpg","thumbnail_width":997,"thumbnail_height":663}