栗喉蜂虎捕食差异

2010年4～5月和2011年4～6月,用焦点动物取样法对云南省保山市潞江镇怒江河谷栗喉蜂虎捕食差异进行了观察。对栗喉蜂虎雌性成年鸟、雄性成年鸟、青年鸟捕食种类、数量、成功率、食物组成、食物资源量、处理食物成功率及处理时间进行了统计。结果表明,栗喉蜂虎捕食种类包括7类昆虫,以膜翅目Hymenoptera、蜻蜓目Odonate、鳞翅目Lepidoptera昆虫为主;成年雄鸟捕食频次高于成年雌鸟和青年鸟;成年鸟与青年鸟处理食物成功率无显著差异,但二者捕食成功率和处理食物时间差异显著。

Individual Differences in Blue-tailed Bee-eaters Foraging Behavior

Foraging difference of blue-tailed bee-eaters was observed with focal animal sampling at Nujiang Valley from April to May, 2010, and April to June, 2011. Variety, quantity, success rate of foraging, food composition and resource, success rate and time of feeding process were recorded in this study. The results showed that blue-tailed bee-eaters preyed mainly on seven groups of insects, especially focusing on Hymenoptera, Odonate and Lepidoptera. Foraging frequencies of adult male birds were higher than those of female adult birds and young birds. There were no significant differences between adult and young birds in factors of success rate of food process, but adult birds were higher in success rate of foraging and lower in time of food process than young birds.