初级飞羽

麻雀雏鸟初级飞羽的生长

Growth of nestlings ' primaries of the tree sparrow

例如，若尾部全黑而在带棕味的初级飞羽中有大的翼格，就是很好的大黑脊鸥特徵。

For example , an all black tail and big wing panel in brownish primaries seems good for Slaty-backed .

鸽初级飞羽的非光滑形态，有利于减少振翅飞翔中产生的空气漩涡的阻力。

The nonsmooth morphology of primaries is propitious to reducing the air vortex resistance which is caused by flapping volitation .

翼上初级飞羽呈现灰白色，翼前缘经常为淡棕色或黄棕色，比飞羽的深灰色要浅。

Upperwing has pale greyish-white primary bases and often pale rufous or yellowish-brown forewing , paler than dark grey flight-feathers .

初级飞羽末端由内向外逐步狭长延伸，而最外侧的3枚飞羽末端则特化成为抹刀状形式。

The tips of the primaries gradually extend outward , and the three most outer primaries change into the spatulate form .

不同部位羽毛中汞的分布规律为：初级飞羽＞次级飞羽＞尾羽＞背羽＞腹羽。其中，初级飞羽和背羽，背羽和腹羽中汞含量均存在明显正相关。

Mercury distribution in feathers conformed to the order : primaries > secondaries > tail feathers > back feathers > abdominal feather .

嘴短而强健，呈圆锥形，稍向下弯；初级飞羽9枚，外缘具两道淡色横斑。

Short and strong mouth , slightly bent downward , cone , Primary and outer ring , with two pale horizontal spot .