The bird has beautiful feathers. Which body part of the bird has feathers? A. wing B. beak C. foot D. head 相关知识点: 试题来源: 解析 A。解析:鸟的翅膀有美丽的羽毛,选项 A 是翅膀,B 是喙,C 是脚,D 是头,答案是翅膀。反馈 收藏 ...
because feathers accumulate wear and tear, and consequently their functionality in thermoregulation, aerodynamics and ornamentation deteriorates with time. In most passerine species, juveniles that replace their nest-
Most of the superficial feathers are contour feathers (pennae). These include the large flight feathers (remiges) of the wing and the long tail feathers (rectrices). Other common feather types include the down feathers (plumulae), intermediate types (semiplumes), and filoplumes (see illustratio...
bird of wonder、Arabian bird不死鸟(阿拉伯古代传说中的凤凰, 传说五、六百年后自焚成灰, 由灰重生)birds of one wing同类的鸟 domestic bird家禽 running bird走禽 bird of 'passage候鸟；漂泊不定的人 bird of ill omen凶鸟(如乌鸦、猫头鹰等)；报凶讯的人, 不吉利的人, 预言灾祸的人 bird dog=gun dog...
Types of Bird Feathers There are 6 commonly recognized types of feathers: Vaned or contour:Form the outer coverings of a bird's body, including the wing & tail feathers. Down:Layer of loosely structured feathers beneath contour feathers which help to trap air near the birds body for warmth....
An aerodynamic structure ubiquitous in Aves is the alula; a small collection of feathers muscularized near the wrist joint. New research into the aerodynamics of this structure suggests that its primary function is to induce leading-edge vortex (LEV) flow over bird's outer hand-wing to enhance...
Wing feathers bird isolated on white background,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、工商银行等数万
Bird, any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from other animals. They are warm-blooded vertebrates more related to reptiles than mammals.
Hummingbirds are the only birds that can fly backwards, thanks to a wingspan that can exceed their full length by at least one-fourth of an inch. They get their name from the humming sound that their wings make when they flap together quickly. On average, a hummingbird weighs even less...
birds of one wing同类的鸟 domestic bird家禽 running bird走禽 bird of 'passage候鸟;漂泊不定的人 bird of ill omen凶鸟(如乌鸦、猫头鹰等);报凶讯的人, 不吉利的人, 预言灾祸的人 bird dog=gun dog猎鸟犬(经训练能够捡回击落的鸟) bird-brain蠢人,傻瓜 ...