曹橾 asked in 科學其他:科學 · 1 decade ago

請問鳥爪的構造是怎樣的?

請問鳥爪的構造,例如有幾隻趾,如何彎曲,如果可以的話麻煩附上各種鳥類足部的特寫,謝謝回答

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  • Jude
    Lv 7
    1 decade ago
    Favorite Answer

    鳥的腳爪基本構造--四支指狀的腳趾,有爪以便於抓物,腳上的皮膚具鱗片,一般是三指朝前方,第四趾朝後,以便抓住樹枝,但不同鳥種因生活習性與覓食環境不同,進化出不同的形態,大致如下:

    圖片參考:http://www.gutenberg.org/files/11896/11896-h/illus...

    http://www.gutenberg.org/files/11896/11896-h/illus...

    http://www.gutenberg.org/files/11896/11896-h/illus...

    1.一般雀鳥的腳 2.夜鷹的腳--中間趾的爪上有梳狀鋸齒 3.啄木鳥的腳--為攀附在垂宜的樹幹上,有兩後趾 4.魚鷹的腳--適於抓住其獵物 5.松雞的腳爪--用以抓挖物 6.金斑'行鳥'的腳--涉水的腳,只有三趾 7.田鷸的腳--涉水的腳,後趾特短 8.綠簑鷺的腳--涉水的腳,後趾長 9.白冠雞的腳--划水的腳,趾上有半蹼 10.加拿大雁的腳--游水的腳,三趾之間有蹼 11.鸕鶿的腳--游水的腳,四趾間皆有蹼

    FIG. 1. Ordinary Foot of Perching Birds; 2. Foot Of Nighthawk, With a Comb on Claw of Middle Toe; 3. Climbing Foot Of Woodpecker, With Two Hind Toes; 4. Grasping Foot of Osprey, for Holding Prey

    FIG. 5. Scratching Foot of Ruffed Grouse; 6. Wading Foot Of Golden Plover, With Only Three Toes; 7. Wading Foot of Snipe, With Short Hind Toe; 8. Wading Foot of Green Heron, With Long Hind Toe; 9. Swimming Foot of Coot, With Lobed Toes; 10. Swimming Foot Of Canada Goose, With Three Toes Webbed; 11. Swimming Foot of Cormorant, With All Four Toes Webbed

    2007-11-05 13:39:52 補充:

    圖片不顯示時請複製網址

    http://www.gutenberg.org/files/11896/11896-h/illus...

    http://www.gutenberg.org/files/11896/11896-h/illus...

    貼上進入,即可看見

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