Diurnal activity pattern of Crested Serpent Eagles Spilornis cheela hoya in Kenting, southern Taiwan

• Main Authors: Chia-hong Liu, 劉家宏
• Other Authors: Hao-jie Xu
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/00957264702005867185

碩士 === 國立臺南大學 === 環境生態研究所碩士班 === 99 === I radiotelemetry-tracked the diurnal activity pattern of 3 unbreeding Crested Serpent Eagles Spilornis cheela hoya, 1 adult male, 1 adult female, and 1 young, from January to August 2008 in Kenting, southern Taiwan. All 3 birds spent most of daylight hours for perching (98.6%), but a few time for inter-perch flight (0.2%), hunting (0.5%), and circling (0.9%). The extremely high proportion of perching behavior might caused by a sit-and-wait foraging strategy of the eagles. The eagles generally ate before noon, whereas the male frequently ate crabs at a valley in afternoon during spring 2008. The diurnal activity pattern of the female and young seldom change through the study period. In contrast, feeding on time of day of the male varied between the spring and summer, spatial and temporal distribution of its food might cause this change.