After completing a night migratory flight in the morning, European Robins begin to make search movements to find a stopover for rest and replenishment of their energy resources. The data on the capture of 111 European Robins during the spring migration on the Courish Spit of the Baltic Sea show that the speed of movement of birds during the search does not depend on air temperature, wind speed, rainfall, or the number of conspecific individuals at the stopover. It is to a small extent affected by the age and energy state of birds, as well as the calendar date. It is assumed that the most powerful influence on the speed of search movements of European Robins in spring is exerted by the endogenous programs for finding stopovers, which differ greatly among individual birds.

中文翻译：

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欧洲知更鸟春季迁徙停止期间搜寻运动速度影响因素分析

早上完成夜间的迁徙飞行后，欧洲知更鸟开始进行搜索运动，寻找中途停留地休息和补充能量。在波罗的海库里什沙嘴春季迁徙期间捕获的 111 只欧洲知更鸟的数据表明，在搜索过程中鸟类的移动速度不取决于气温、风速、降雨量或同种个体的数量在中途停留。它在一定程度上受鸟类的年龄和能量状态以及日历日期的影响。假设对欧洲知更鸟春季搜索运动速度的最强大影响是由寻找中途停留点的内源程序施加的，这些程序在个体鸟类之间差异很大。