Among his examples are vampire bats tuned to extract blood from large slumbering mammals and bats that aim instead for the warm breast plates of birds; New World leeches that track their hosts through the water and Old World leeches that relentlessly stalk down blood bearers on land; the notorious vampire finches of the Galapagos that daintily peck open dribbling wounds on the hindquarters of blue-footed boobies; and the candiru, tiny, eel-like catfish that are reputed to have the power to swim up a person's urethra and suck blood from the bladder and thus are often more feared than their fellow river dwellers, the piranhas.

他舉的例子有自靜止狀態(tài)的大型哺乳動物吸血的吸血蝙蝠，與轉而瞄準鳥兒溫暖胸脯的蝙蝠；西半球的水蛭透過水來找寄主，東半球的水蛭在陸地上無情追蹤帶血的對象在线观看国产爆草视频网站免费；加拉巴哥群島惡名昭彰的吸血鳴鳥一點一滴優(yōu)美地在藍腳鰹鳥的尾部啄出傷口；還有短小鰻形的寄生鯰日韩福利免费网站，以直接游入人類尿道從膀胱吸血而知名精品丝袜国产自在线拍AV一区，因此比同條河里的食人魚更令人畏懼。

anticoagulant：抗凝血劑

以吸血為食,可算是我們溯溪愛好者的夢魘.利用吸盤附在寄主體上,吸取寄主血液時,會分泌唾液(saliva),唾液中含有一種抗凝血劑(anticoagulant),稱水蛭素(hirudin),會使傷口的血無法凝固,如此它就可繼續(xù)不斷吸食.

Hirudinea：蛭綱

水蛭(leech)又叫螞蝗,屬於環(huán)節(jié)動物(Annelida)蛭綱 (Hirudinea),為雌雄同體,但須異體受精. 以吸血為食,可算是我們溯溪愛好者的夢魘.利用吸盤附在寄主體上,吸取寄主血液時,會分泌唾液(saliva),唾液中含有一種抗凝血劑(anticoagulant),