Marie Read / Blue jay (Cyanocitta cristata) holding an acorn in its bill whilst perched on tree stump, with autumn foliage, New York, USA, October.

Markus Varesvuo / Jay (Garrulus glandarius), two fighting in mid-air with another observing. Norway. October.

Markus Varesvuo / Jay (Garrulus glandarius), two fighting in mid-air with another observing. Norway. October.

Alan Murphy/ BIA / Great Kiskadee (Pitangus sulphuratus) and Green Jay (Cyanocorax yncas) fighting, Texas

Dave Bevan / Slow motion clip of a Jay (Garrulus glandarius) feeding from a peanut string during a snowstorm, Carmarthenshire, Wales, UK, November.

Bence Mate / Jay (Garrulus glandarius) jumping into the air, Pusztaszer, Kiskunsagi National Park, Hungary, November.

Tim Zurowski/ BIA / Steller's Jay (Cyanocitta stelleri), British Columbia, Canada

Donald M. Jones / Steller's Jay (Cyanocitta stelleri), western Montana

Scott Leslie / Florida Jay (Aphelocoma coerulescens), Merritt Island National Wildlife Refuge, Florida

Tim Zurowski / Steller's Jay (Cyanocitta stelleri), British Columbia, Canada

Tim Zurowski / Steller's Jay (Cyanocitta stelleri), British Columbia, Canada

Tim Zurowski / Island Scrub Jay (Aphelocoma insularis), California