Marie Read / American Robin (Turdus migratorius), feeding on winterberry (Ilex) fruits in winter, New York, USA, December.

Stephen Dalton / Close-up of holly leaf (Ilex aquifolium).

Simon Colmer / European Holly with leaves and berries (Ilex aquifolium) covered in snow, UK

John Waters / Holly bush (Ilex aquifolium) with berries in snow covered landscape, Quantocks, Somerset, UK

Kim Taylor / Redwing (Turdus iliacus) feeding on Holly (Ilex) berries, Surrey, England, UK, December.

Sylvain Cordier / European holly ( Ilex aquifolium) , female tree with red fruits, Haut Rhin, France.

Scott Leslie / American Goldfinch (Carduelis tristis) in Virginia Winterberry (Ilex verticillata) bush, North America

Rolf Nussbaumer / Bewick's wren (Thryomanes bewickii), adult perched on icy branch of Possum Haw Holly (Ilex decidua) with berries, Hill Country, Texas, USA. February

Cyril Ruoso / Holly (Ilex aquilfolium) in winter frost, Alberes Mountains, Pyrenees, France, February.

Cyril Ruoso / Woodland scene from above with Holly (Ilex aquilfolium) colonizing meadow, Alberes Mountains, Pyrenees, France, October 2011.

Cyril Ruoso / Woodland scene from above with Holly (Ilex aquilfolium) the first species to colonize the adjacent meadow, Alberes Mountains, Pyrenees, France, October 2011.

Cyril Ruoso / Holly (Ilex aquilfolium) colonizing meadow adjacent to woodland, Alberes Mountains, Pyrenees, France, March 2011.