crissum 的定义
plural cris·sa [kris-uh]. /ˈkrɪs ə/. Ornithology.
- the region surrounding the cloacal opening beneath the tail of a bird.
- the feathers of this region collectively.
更多crissum例句
- Female olive-brown, paler below, chin pale ochraceous; middle of belly and crissum white; bill brown, feet yellowish.
- Female: above grey, densely striated with black; beneath dirty white, with dense black striations, belly and crissum fulvous.
- Below, bright lemon-yellow, the crissum white or merely tinged with yellow.
- Below grayish buff rapidly fading when older to a greenish gray; abdomen and crissum pale straw-yellow.
- Below, olive-yellow darker on the flanks, the abdomen and crissum white.