Field mark

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. In a broader context, a field mark might be referred to as a character (e.g. "differential character" or "diagnostic character"). For birds this may include plumage, flight characteristics, proportions, voice, behaviour, etc., i.e., all characteristics that help identification. As opposed to in-hand marks, distinguishable when a specimen is held in the hand, field marks are especially those marks that remain useful in less than optimal conditions, for example when the subject is far removed, only partly visible or not sufficiently lit to see its colours.

单词	Field mark
释义	Field mark 原声例句 VOA慢速英语_单词故事 In soccer, players try to get a ball into the other side's goal, an area at the end of the playing field marked by a net. 在足球比赛中，球员尝试把球踢入对方的球门中，也就是球场一端有网的区域。英语百科 Field mark 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. In a broader context, a field mark might be referred to as a character (e.g. "differential character" or "diagnostic character"). For birds this may include plumage, flight characteristics, proportions, voice, behaviour, etc., i.e., all characteristics that help identification. As opposed to in-hand marks, distinguishable when a specimen is held in the hand, field marks are especially those marks that remain useful in less than optimal conditions, for example when the subject is far removed, only partly visible or not sufficiently lit to see its colours.
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