- 期刊
紫嘯鶇育雛行為之初步研究
A Preliminary Study on the Breeding Behavior of the Formosan Whistling Thrush
摘要
紫嘯鶇（Myiophoneus insularis）是一種臺灣持有的留鳥。對此鳥的生活史所知極少，為了瞭解此種鳥類的哺育行為；我們於73年（1984）的紫嘯鶇繁殖季節（3－9月）在台北縣石碇地區對此種鳥類做了長時間的觀察。由初步研究結果顯示，紫嘯鶇的幼鳥由孵化到離巢，平均約需21天。孵卵及孵雛的工作由雌鳥單獨擔任，其他育雛的工作，包括清潔，餵食及護巢等，則由雌雄親鳥共同分擔，唯雄鳥在護巢方面扮演較主要的角色。親鳥餵食的食物種類相當廣泛，昆蟲及蚯蚓是最常見的食物，然青蛙及蛇等中大型之食物亦偶爾可見。隨著幼鳥的成長，餵食的次數有遞減的現象，而食物的體積卻有逐漸增加的趨勢。由昆蟲活動的時間及親鳥覓食的程度推測，親鳥於育雛期間，可能有主動選擇食物的趨向。
關鍵字
無資料並列摘要
The breeding behavior of the Formosan Whistling Thrush (Myiophoneus insularis), an endemic species to Taiwan, was studied at Shi-tin, Which is located 16 km southeast from Taipei. Eight active nests were observed through pairs of binoculars by at least 2 observers for at least 2 days per week from March to Septemhber, 1984. From the prelimimry observation, we found that the average fledging period of this species was 21 days. Incubation and nest brooding were performed by the parental female only while nest cleaning, feeding of young, and nest defending were shared by both parents except that male took a major role in the nest defending. Food items that parents brought back to nests to feed young were versatile from the most commonly occurred food such as insects and earthworms to the less frequently observed items such as frogs and snakes. There was a distinctive feeding pat tern in this species ie., feeding frequency among parent s decreased through the brooding period, yet the total biomass of food items that parents brought back to nests increased from the early to late brooding period as a result from carrying larger food items back to nests by parents during the mid and late brooding stage. From the available food that birds might have and the actual feeding pattern of birds, we suspect that parents actively select large food items to feed their young during the late brooding stage.