Around the UK, Jays haven’t needed to dip into their large cache of acorns much this winter, with the weather being so mild. They will top up their diet with invertebrates and any other meaty treats they can get. This search can lead them to gardens during cold periods and some of these gardens are occupied by BTO ringers.

Click on the link to read the rest of the article: BTO Bird Ringing – ‘Demog Blog’: What happened to all the Jays?