The phenomenon of bird migration has fascinated and inspired for generations - thousands of birds travelling astonishing distances across ecological barriers of deserts, mountains and seas. But for many species life is getting tougher on their wintering, breeding or staging grounds, resulting in long term declines in numbers. By focusing on work on one species, the wood warbler, in one of the main global flyways, the African Eurasian flyway, this talk will illustrate the challenge of understanding the drivers of declines of migrant birds. Prof. Juliet Vickery will describe the results of work on wood warblers on their breeding grounds in the UK and their wintering and staging grounds in Sub Sahara West Africa. She will also consider how we can use these results to inform future action to address declines of these widespread long-distance travellers and to what extent this action may benefit other migrant birds on the same flyway. This lecture is to be held by a Zoom meeting. Invitations will be sent to members prior to the lecture.