Gary K. Smith / Mistle thrush (Turdus viscivorus) feeding on Mistletoe berries (Viscum album), England, UK. March

Alan Williams / Mistletoe (Viscum album) growing on Apple tree (Malus domestica) in orchard Cheshire, England, UK, August.

Laurie Campbell / Mistletoe (Viscum album) close-up of berries, England, December.

Laurie Campbell / Mistletoe (Viscum album) close-up of berries, England, December.

Laurie Campbell / Mistletoe (Viscum album) close-up of berries, England, December.

Laurie Campbell / Mistletoe (Viscum album) close-up of berries, England, December.

Paul Harcourt Davies / Berries of Yellow-berried mistletoe (Loranthus europeaus). Podere Montecucco, Umbria, Italy, February.

Fabrice Cahez / European mistletoe (Viscum album) Vosges, France, December.

Fabrice Cahez / European mistletoe (Viscum album) Vosges, France, December.

Adrian Davies / Mistletoe (Viscum album) studio shot of plant and berry / fruit, UK

Adrian Davies / Mistletoe (Viscum album) studio shot of plant and berry / fruit, UK

Alex Hyde / Woodland surrounding Veliki Prstavci waterfalls, with Mistletoe (Viscum album) on European beech (Fagus sylvatica) growing on the tree branches. Plitvice Lakes National Park, Croatia. November.

Will Watson / Mistletoe (Viscum album) berries, growing on Hawthorn (Crataegus monogyna), Worcestershire, England, UK, April.

Mike Read / Mistletoe (Viscum album) on white background, Ringwood, Hampshire, England, UK, February.

Alex Hyde / Mistletoe (Viscum album) growing in tree, Somerset UK. February.

Alex Hyde / Mistletoe (Viscum album) infestation in Common lime tree (Tilia x europaea). Somerset UK. February.

Loic Poidevin / Poplar tree (Populus) covered in Mistletoe (Viscum album) and surrounded by water of Lake Grandlieu in winter, West France

Colin Varndell / Mistletoe (VIscum album) berries. Somerset, UK, November.

Colin Varndell / Mistletoe (Viscum album) growing on apple tree. Somerset, UK November

Fabrice Cahez / Mistle thrush (Turdus viscivorus) perched next to Mistletoe (Viscum album) in winter, Vosges, France, January

Gary K. Smith / Mistletoe (Viscum album) seed deposited by bird on apple tree, showing embryo roots attached to bark. Norfolk, England, April.

Philippe Clement / Mistletoe (Viscum album) infestation on tree in spring. La Brenne, France, April.

Nick Upton / Mistletoe (Viscum album) male plant growing on an apple tree (Malus domesticus) in evening light, Brandenburg, Germany, April.

Philippe Clement / European Mistletoe (Viscum album) close-up of branch of male, Luxembourg

Mark Bowler / Mistletoe (Viscum album) twig with two berries

Gary K. Smith / Mistletoe (Viscum album) with ripe white berries on old apple tree, Norfolk, England, UK, December

Gary K. Smith / Mistletoe (Viscum album) high on Common Lime tree (Tilia vulgaris), Norfolk, England, UK, October

Gary K. Smith / Mistletoe (Viscum album) high on Common Lime tree (Tilia vulgaris), Norfolk, England, UK, October

Christoph Becker / Mistletoe {Viscum album} Germany

Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) tree. La Brenne, France

Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) La Brenne, France

Philippe Clement / Mistletoe (Viscum album) in Poplar trees (Populus sp) La Brenne, France 2007

Philippe Clement / Mistletoe (Viscum album) in Poplar trees (Populus sp) La Brenne, France

Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) La Brenne, France

Martin Gabriel / Mistletoe {Viscum album} in Birch tree {Betula pendula} Bavaria, Germany

Niall Benvie / Mistletoe berries {Viscum album} against Poplar bark Bialowieza NP, Poland

Dave Watts / Mistletoe with berries {Viscum album} France

Tony Evans / Mistletoe with berries {Viscum album} UK

Artur Tabor / Mistletoe {Viscum album} in White poplar {Populus alba} tree. Poland.

Jose B. Ruiz / Mistletoe {Viscum album} on tree. Segovia, Spain.

Jose B. Ruiz / Mistletoe {Viscum album} on tree Segovia, Spain.

Jose B. Ruiz / Mistletoe with berries on tree trunk {Viscum album} Segovia, Spain.

Jose B. Ruiz / Mistletoe with berries on tree, Spain.

DAVID TIPLING / Mistletoe with berries {Viscum album} Glos, UK.

DAVID TIPLING / Mistletoe {Viscum album} with berries, Glos, UK.

Kim Taylor / Mistletoe (Viscum album) with berries in winter. Surrey, UK

Nature Production / Japanese Waxwing {Bombycilla japonica} note excrement containing Mistletoe seeds {Viscum album ssp. Coloratum} Aichi, Japan, February

Adrian Davies / Mistletoe in trees {Viscum album} England, UK

Mike Read / Mistle thrush (Turdus viscivorus) perched amongst Mistletoe (Viscum album) feeding on berries, Ringwood, Hampshire, England, UK. December.

Linda Pitkin / Mistletoe (Viscum album) parasitizing Carolina poplar (Populus x canadensis) tree, Wallington, Surrey, England. January.

Adrian Davies / Mistletoe (Viscum album) growing on ornamental Cherry tree, showing point of entry into host plant, Surrey, UK. March.

Adrian Davies / Mistletoe (Viscum album) attached to host plant, cross section.

Adrian Davies / Mistletoe (Viscum album), a hemiparasite, haustoria entering host plant, shown under UV fluorescence.

Paul Harcourt Davies / Mistletoe (Vascum album) fruit, a parasitic plants attached to their host tree or shrub, Umbria, Italy. December.

Paul Harcourt Davies / Mistletoe (Viscum album) leaves and berries, Umbria, Italy, December.

John Waters / Mistletoe (Viscum album) growing on old Apple tree, (Malus domestica) Beside River Parrett, near Langport, Somerset, UK. March.

Linda Pitkin / Mistletoe (Viscum album). Box Hill, Surrey, England, UK. March.

Linda Pitkin / Mistletoe (Viscum album). Box Hill, Surrey, England, UK. March.

Linda Pitkin / Mistletoe (Viscum album) growing on tree. Hampton Court, Richmond Upon Thames, England, UK. March.

Linda Pitkin / Mistletoe (Viscum album) with flowers. Box Hill, Surrey, England, February.

Linda Pitkin / Mistletoe (Viscum album) with flowers. Box Hill, Surrey, England, February.