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白 頷 樹 蛙 |
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斑腿樹蛙 White lipped Tree Frog 成體特徵： 體長：大型修長，♂5-6cm，♀6-7cm 頭部：頭寬小於頭長，吻端尖，上唇白色。顳褶橘紅色，從吻端經眼鼻線及顳褶下方有一條黑線。 背部：深褐色或褐色，有4-6條深褐色縱帶，間雜一些斑點，或僅有一些斑點沒有縱帶。 體側：腹側白色有黑白相間的網狀花紋。 皮膚：光滑沒有顆粒。 腹部：白色，有圓形顆粒。 前肢：細長，有黑色橫帶。指間有微蹼，吸盤發達。 後肢：細長，有黑色橫帶。趾間有蹼，趾吸盤小於指吸盤。無外蹠突。股部內側有黑白相間的網狀花紋。 第二性徵：雄蛙較雌蛙小，有單一咽下外鳴囊。 相近種類比較：褐樹蛙上唇為黑白相間的橫紋，眼鼻線及顳褶下方沒有黑線。 分布：廣泛分布於全省一千公尺以下的果園及雜木林裡。 繁殖期：主要在春天及夏天繁殖，尤其喜歡在春雨及梅雨時節活動 行為：平常棲息在樹上，繁殖期時常聚集在水邊的植物體上或者地面遮蔽物底下鳴叫，形成上百隻青蛙的大合唱。由於它們的叫聲有如連珠炮般的「搭、搭、搭」，聽起來常有置身靶場的錯覺，頗具有震撼效果。在雌雄數目懸殊的情況，會出現一隻雌蛙和多隻雄蛙交配共同產卵的現象，也產生同母異父的子代，藉此可以提高雄蛙交配的機會。 卵：產黃色泡沫型卵塊，常常好幾個卵塊聚成一大團高掛在樹上，每個卵塊內有400-500顆白色的卵粒。卵塊經常被蒼蠅產卵寄生並長蛆，無法發育成蝌蚪。 蝌蚪：大型，尾鰭高而薄，吻端上方有一顆白色斑點。
Natural History: Polypedates megacephalus is a widespread species inhabiting in hillsides and orchards at low elevations. Breeding season is from March to August. They are more active during the heavy rains, congregating in choruses of several hundreds. Males usually call on treetop and vegetation along the banks of still water. Sometimes they call on ground, hiding in vegetation or caves. One female mating with multiple males has been reported. About 300-400 eggs are deposited in a yellowish foamy mass, attached on vegetation or banks near the still water. Embryos in egg masses are easily to suffer death for parasitized by fly larvae. After hatching, larvae fall or wriggle into the water nearby and grow there.
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