A Preliminary Study on Nest Site Selection and Nest Success of the Black-naped Blue Monarch (Hypothymis azurea) in Linnei Township and Douliu hilly area, Yunlin County

• Main Authors: Hua-Hsiang Chen, 陳華香
• Other Authors: Ruey-Shing Lin
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/avr25m

碩士 === 靜宜大學 === 生態學研究所 === 97 === The successful rates of Passeriformes reproductive are generally low. The factors include predation of predators, harsh climate, and reusable resources and so on. In order to understand how the relationship between nesting sites and environmental factors influence the reproductive success rates of Black-naped Blue Monarch (Hypothymis azurea), the investigation in nesting sites and habitat traits was started in Linnei Township and Douliu hilly area, Yunlin County in 2007 and 2008, setting up the basic data of bird nests. The composition of the nest was an open cupped and the layers from exterior to interior were named as attachment, out layer, structure, and the lining. The lining layer was not obvious, not all the nests had it. Each layers had various materials, and the bamboo leaf, moss and silk appear the most, and every nest had them. A total of 58 nests, with 22 successful and 36 failed. The main reason of failure comes from predators, secondly the harsh climate and other unknown reasons. The comparison of all the habitat traits shows a significant difference in the height of the nest and the distance from the canopy to the nest, the other traits shows no significant difference; A total of 36 nests collected and analyzed shows no significant difference between the nest size, weight and the success rates. Collected nests were then separated apart to see the composition. The birds used a variety of nesting plants, but the selection of the nesting branches had a common character, which was a Y-shaped twig or a H-shaped vine.