Barometer logging reveals new dimensions of individual songbird migration

Recent advances in tracking technology are based on the use of miniature sensors for recording new aspects of individual migratory behaviour. In this study, we have used activity data loggers with barometric and temperature sensors to record the flight altitudes as well as ground elevations during stationary periods of migratory songbirds. We tracked one individual of red-backed shrike and one great reed warbler along their autumn migration from Europe to Africa. Both individuals performed their migration stepwise in travel segments and climbed most metres during the passage across the Mediterranean Sea and the Sahara Desert and least metres during the first flight segment in Europe. The great reed warbler reached its highest flight altitude of 3950 m above sea level (a.s.l). during the travel segment from Europe to west Africa, while the red-backed shrike reached 3650 m a.s.l as maximum flight altitude during its travel segment from Sahel to southern Africa. Both individuals used both ...追踪技术的最新进展，核心依托微型传感器以记录迁徙个体行为的全新观测维度。本研究采用搭载气压与温度传感器的活动数据记录仪，记录迁徙鸣禽的飞行高度以及停留时段的地面高程。本研究追踪了1只红背伯劳（red-backed shrike）与1只大苇莺（great reed warbler）的欧洲至非洲秋季迁徙全程。两只个体均通过分段航段逐步完成迁徙：其在穿越地中海与撒哈拉沙漠的航段中累计爬升高度最多，而在欧洲境内的首个飞行航段中累计爬升高度最少。大苇莺在欧洲至西非的航段中达到3950米的最高飞行海拔（a.s.l），红背伯劳的最高飞行海拔为3650米a.s.l，对应其从萨赫勒地区至非洲南部的航段。两只个体均同时采用了……