Brian Bevan / Long tailed tit (Aegithalos caudates) nest building, Bedfordshire, England, UK, April.

Colin Varndell / Long-tailed tit (Aegithalos caudatus) profile portrait, Dorset, UK February

Ben Hall / Long tailed tits (Aegithalos caudatus) pair perched on pine branch in snowfall, Cheshire, UK March

Grzegorz Lesniewski / Long-tailed Tit (Aegithalos caudatus) portrait. Bieszczady National Park, the Carpathians, Poland, March.

Stephen Dalton / Blue tits (Parus caeruleus) feeding at nut feeder, Long tailed tit (Aegithalos caudatus) flying to feeder, UK

Andy Rouse / Long tailed tit (Aegithalidae caudatus) perched on branch, UK

WILLIAM OSBORN / Long tailed tit & sallow flowers UK

Ashley Cooper / Long-tailed tit (Aegithalos caudatus) gathering feathers for nest. May.

John Chan / Female Bushtit (Psaltriparus minimus) returning to nest to feed chicks, carries away a fecal sac, Southern California, USA, April.

John Chan / Bushtit (Psaltriparus minimus) returning to nest to feed chicks, Southern California, USA, April.

John Chan / Female Bushtit (Psaltriparus minimus) departing from nest as the male returns to feed chicks, Southern California, USA, April.

Fabrice Cahez / Long-talled tit (Aegithalos caudatus) perched, Vosges, France, April.

David Tipling / Long-tailed tits (Aegithalos caudatus) on fat ball feeder in garden Norfolk, England, UK. February.

Steve Downer / Long tailed tits (Aegithalos caudatus) feeding on suet bird feeder, Birmingham, England, UK, March.

Nick Upton / Long-tailed tit (Aegithalos caudatus) perched on a bird feeder filled with peanuts alongside Blue tits (Parus caeruleus) Gloucestershire, UK, February.

Jussi Murtosaari / Long-tailed tit (Aegithalos caudatus caudatus) placing feather in nest, Finland. April.

Jussi Murtosaari / Long-tailed tit (Aegithalos caudatus caudatus) with feather for nest, Finland. April.

Jussi Murtosaari / Long-tailed tit (Aegithalos caudatus caudatus), Finland, March.

Dave Bevan / Long tailed tit (Aegithalos caudatus) feeding chicks, Carmarthenshire, Wales, UK, June

Dave Bevan / Long tailed tits (Aegithalos caudatus) feeding from a bird table alongside Blackbirds (Turdus merula), Common chaffinches (Fringilla coelebs), Bramblings (Fringilla montifringilla) and Greenfinches (C...

Dave Bevan / Long tailed tit (Aegithalos caudatus) feeding on a sunflower seed whilst perched in a tree, Norfolk, England, UK, February.

Dave Bevan / Long tailed tit (Aegithalos caudatus) taking a sunflower seed from a bird table before flying away, Norfolk, England, UK, February.

Colin Varndell / Long-tailed tit (aegithalos caudatus) perched on twig in winter, Dorset, UK, February.

Andy Sands / Long tailed tit (Aegithalos caudatus) at nest with chicks at entrance hole, Hertfordshire, England, UK, April

Andy Sands / Long tailed tit (Aegithalos caudatus) at nest with chicks at entrance hole, Hertfordshire, England, UK, April

Colin Varndell / Long-tailed tit (Aegithalos caudatus) in winter. Dorset, UK.

Ernie Janes / Long tailed tit (Aegiyhalos caudatus) on peanut feeder, England, UK, February.

Ernie Janes / Long tailed tit (Aegiyhalos caudatus) on hazel catkins, England, UK, February.

Ernie Janes / Long tailed tit (Aegithalos caudatus) on Hazel branch with catkins, England, UK, February.

Stephen Dalton / Long tailed tits (Aegithalos caudatus) on lichen covered branch, Sussex, UK December

Stephen Dalton / Long tailed tit (Aegithalos caudatus) on lichen covered branch, Sussex, UK December

Stephen Dalton / Long tailed tit (Aegithalos caudatus) on lichen covered branch, Sussex, UK December

Stephen Dalton / Long tailed tits (Aegithalos caudatus) small flock feed on hanging feeder, Sussex, UK December

Aflo / Long-tailed tit (Aegithalos caudatus) hanging upside down from branch in autumn, Japan. December.

Jussi Murtosaari / Long-tailed bushtit (Aegithalos caudatus) hanging upside down, north European form with white head, Uto, Korppoo, Parainen / Lansi-Turunmaa, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finl...

Jussi Murtosaari / Long-tailed bushtit (Aegithalos caudatus) white headed form, Uto, Korppoo, Parainen / Lansi-Turunmaa, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. February

Jussi Murtosaari / Long-tailed bushtit (Aegithalos caudatus) north European form with white head, Uto, Korppoo, Parainen / Lansi-Turunmaa, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. February

Dong Lei / Black-throated tits (Aegithalos concinnus) in tree, Gaoligong Mountain National Nature Reserve, Tengchong county, Yunnan Province, China.

David Tipling / Long-tailed Tit (Aegithalos caudatus) in garden, Norfolk, England, UK, December.

David Tipling / Long-tailed Tit (Aegithalos caudatus) in garden, Norfolk, England, UK, December.

David Tipling / Long-tailed tit (Aegithalos caudatus), Norfolk, February.

Markus Varesvuo / Long-tailed Tit (Aegithalos caudatus), Hanko Finland October

Markus Varesvuo / Long-tailed Tit (Aegithalos caudatus), Helsinki Finland January

Markus Varesvuo / Long-tailed Tit (Aegithalos caudatus) adult at nest hole in tree with chicks. Helsinki, Finland. May

Dong Lei / Black-browed Tit (Aegithalos bonvalotis) perched, Lijiang City, Yunnan Province, China, Asia

Dong Lei / Black-throated Tit (Aegithalos concinnus) perched in tree, Chengdu City, Sichuan Province, China, Asia

Markus Varesvuo / Long-tailed tit (Aegithalos caudatus) perched on twig, Uto, Finland, October.

Stephen Dalton / Long tailed tits (Aegitalos caudatus) and Blue tits (Cyanistes caeruleus) on bird feeder, Sussex, England, UK, March.

Dong Lei / Crested tit warbler (Leptopoecile elegans) on Old mans beard lichen (Usnea sp) Ruoergai National Nature Reserve, Sichuan Province, China, October.

Mathias Schaef / Long-tailed Tit (Aegithalos caudatus), Germany

Jussi Murtosaari / Long-tailed tit (Aegithalos caudatus) central Finland, April.

Jussi Murtosaari / Long-tailed tit (Aegithalos caudatus) central Finland, March.

Andres M. Dominguez / Long-tailed Tit (Aegithalos caudatus), Cadiz, Spain

Steve Knell / Long-tailed tit (Aegithalos caudatus rosaceus) adult perched on lichen covered twig, looking at camera, Lancashire, England, UK. March

Steve Knell / Long-tailed tit (Aegithalos caudatus rosaceus) adult perched on lichen covered twig, Lancashire, England, UK. March

Steve Knell / Long-tailed tit (Aegithalos caudatus rosaceus) adult perched on bramble, Lancashire, England, UK. March

Steve Knell / Long-tailed tit (Aegithalos caudatus rosaceus) adult perched on lichen covered twig, looking inquisitive, Lancashire, March

Steve Knell / Long-tailed tit (Aegithalos caudatus rosaceus) adult perched on lichen covered twig, Lancashire, England, UK, March.

Steve Knell / Long-tailed tit (Aegithalos caudatus rosaceus) adult perched on lichen covered twig, Lancashire, England, UK. March.

Steve Knell / Long-tailed tit (Aegithalos caudatus rosaceus) adult perched on lichen covered twig, Lancashire, England, UK. March

Kim Taylor / Long-tailed Tits (Aegithalos caudatus) feeding from bowl. Surrey, England, Januaray

Alan Williams / Long-tailed Tit (Aegithalos caudatus) eating Sunflower seed while hanging on feeder arm in garden Cheshire, UK, February

Bence Mate / Juvenile Long-tailed tit (Aegithalos caudatus) calling at waters edge, Pusztaszer, Kiskunsagi National Park, Hungary

Bence Mate / Flock of Long-tailed tits (Aegithalos caudatus) at water's edge, with reflections, Pusztaszer, Kiskunsagi National Park, Hungary

Bence Mate / Long tailed tit {Aegithalos caudatus} Pusztaszer, Hungary

Colin Varndell / Long-tailed tit (Aegithalos caudatus rosaceus). Dorset, UK, February.

Ernie Janes / Long tailed tit (Aegithalos caudatus) perched, UK

Wild Wonders of Europe / Préau / Man measuring Long tailed tit (Aegithalos caudatus) wing, caught in net for ringing in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Wild Wonders of Europe / Préau / Man ringing Long tailed tit (Aegithalos caudatus) caught in net for ringing in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Wild Wonders of Europe / Préau / Man ringing Long tailed tit (Aegithalos caudatus) caught in net for ringing in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Wild Wonders of Europe / Préau / Man ringing Long tailed tit (Aegithalos caudatus) caught in net for ringing in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Wild Wonders of Europe / Préau / Man releasing Long tailed tit (Aegithalos caudatus) after ringing, caught in net for ringing in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Wild Wonders of Europe / Préau / Man releasing Long tailed tit (Aegithalos caudatus) after ringing, caught in net for ringing in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Wild Wonders of Europe / Préau / Man removing Long tailed tit (Aegithalos caudatus) from mist net for ringing, in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Wild Wonders of Europe / Préau / Long tailed tit (Aegihalos caudatus) caught in mist net for ringing, in allotment, Grande-Synthe, Dunkirk, France, September 2010, model released

Laurie Campbell / Two Long-tailed tits (Aegithalos caudatus) on peanut feeder in garden, Berwickshire, Scotland, March

Loic Poidevin / Long Tailed Tit (Aegithalos caudatus) perched among twigs. The Vendeen Marsh, French Atlantic Coast, February.

Loic Poidevin / Long Tailed Tit (Aegithalos caudatus) perched among blossom. The Vendeen Marsh, French Atlantic Coast, March.

David Kjaer / Long-tailed Tit (Aegithalos caudatus) on a mossy stone by water. Wiltshire, UK, April.

Paul Hobson / Long tailed tit (Aegithalos caudatus) perched amongst Haxel catkins, UK, April

Ernie Janes / Long Tailed Tits (Aegithalos caudatus) on peanut feeder. UK, April.

Ernie Janes / Long Tailed Tit (Aegithalos caudatus) perching. UK, April.

Ernie Janes / Long Tailed Tit (Aegithalos caudatus) on peanut feeder. UK, April.

Andy Rouse / Long Tailed Tit (Aegithelos caudatus) taking off from a twig. Wales, UK, Europe, February.

Andy Rouse / Long Tailed Tit (Aegithalos caudatus) on perch. Wales, UK, Europe, February.

Will Watson / Eight Long-tailed Tits (Aegithalos caudatus) on bird feeder attached to Downy Birch (Betula pubescens) tree, Herefordshire, UK

Dave Bevan / Long tailed tit (Aegithalos caudatus) perching on branch, UK

Gary K. Smith / Long tailed tit (Aegithalos caudatus) perched on hedgerow, Norfolk, UK, November

Stephen Dalton / Long-tailed tit {Aegithalos caudatus} flying to bird feeder with three Blue Tits {Parus caeruleus} on feeder, UK

Andy Rouse / Long tailed tit (Aegithalidae caudatus) perched on branch, UK

Alan Williams / Long tailed tit (Aegithalos caudatus) perched, Cheshire, UK, January

Alan Williams / Long tailed tit (Aegithalos caudatus) perched, Cheshire, UK, January

Alan Williams / Long tailed tit (Aegithalos caudatus) perched, Essex UK, March

Alan Williams / Long tailed tit (Aegithalos caudatus) perched, Essex UK, March

Alan Williams / Long tailed tit (Aegithalos caudatus) with feather for nest building in bramble patch, Essex, UK, March

Alan Williams / Long tailed tit (Aegithalos caudatus) with feather for nest building in bramble patch, Essex, UK, March