The common kestrel roosts and hunts alone, but the lesser kestrel roosts and hunts in flocks, possibly so one bird can learn from others where to find insect swarms.

• 普通红隼单独猎食、独自栖息，而较小的红隼则成群地捕食栖息，也许在这样的群居生活中，鸟儿便可从群中的同伴那里学会到什么地方可以找到虫群。