通常，头部、腿部、及尾巴上的斑点比身躯的斑点小。
Spots are usually smaller on the head, legs and tail than on the body.
一种新大陆鸟（猩红裸鼻雀） ，其雄性鸟有亮红羽毛，黑色尾巴及翅膀。
A New World bird (Piranga olivacea) the male of which has bright scarlet plumage with a black tail and wings.
它们有一条推进用的尾巴，咽及鳃裂。
Iv. They present a propulsive tail, pharynx and branchial openings.
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