摘要
Caption: "FLYING FROG". From a drawing by the author. Drawn on wood by Keulemans.
Drawing of a Flying Frog from Alfred Russel Wallace's book The Malay Archipelago. The newer version is from Papua Web: The Malay Archipelago (The Indo-Malay Islands)
See also: Image:Haeckel Batrachia.jpg, which uses this illustration and others of frogs.
Context
One of the most curious and interesting reptiles which I met with in Borneo was a large tree-frog, which was brought me by one of the Chinese workmen. He assured me that he had seen it come down in a slanting direction from a high tree, as if it flew. On examining it, I found the toes very long and fully webbed to their very extremity, so that when expanded they offered a surface much larger than the body. The forelegs were also bordered by a membrane, and the body was capable of considerable inflation. The back and limbs were of a very deep shining green color, the under-surface and the inner toes yellow, while the webs were black, rayed with yellow. The body was about four inches long, while the webs of each hind foot, when fully expanded, covered a surface of four square inches, and the webs of all the feet together about twelve square inches. As the extremities of the toes have dilated discs for adhesion, showing the creature to be a true tree frog, it is difficult to imagine that this immense membrane of the toes can be for the purpose of swimming only, and the account of the Chinese man, that it flew down from the tree, becomes more credible. This is, I believe, the first instance known of a "flying frog," and it is very interesting to Darwinian as showing that the variability of the toes which have been already modified for purposes of swimming and adhesive climbing, have been taken advantage of to enable an allied species to pass through the air like the flying lizard. It would appear to be a new species of the genus Rhacophorus, which consists of several frogs of a much smaller size than this, and having the webs of the toes less developed. They jump from tree to tree and use their webbed feet to glide.
授權條款
Public domainPublic domainfalsefalse
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本作品在其來源國以及其他版權期限是作者逝世後70年或以下的國家與地區屬於公有領域。
你必須增加美國公有領域標籤顯示為何這個作品在美國屬於公有領域。 請注意少數國家的著作權保護期為70年以上:墨西哥為100年,牙買加為95年,哥倫比亞為80年,瓜地馬拉與薩摩亞為75年,而這些國家不實施較短期限法則,因此該圖片可能在這些國家不被認為是公有領域。宏都拉斯的著作權期限一般為75年,但該國實施較短期限法則。對於在第二次世界大戰期間為法國利益戰死的法國人(更多資訊)、二戰期間參與過蘇德戰爭(俄羅斯稱之為偉大的衛國戰爭)的俄羅斯人,以及蘇聯時期遭到鎮壓,而死後獲得平反的犧牲者(更多資訊),這些人的作品著作權期限會有所延長。
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此作品無已知的著作權限制,亦不受所有相關和鄰接的權利限制。
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https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse