Mark Hamblin / 2020VISION / Coal tit (Periparus ater) in flight, Scotland, January. Did you know? Britain has its own subspecies of Coal tit - which is more olive in colour than its European relatives.

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) adult perched in winter, Scotland, UK, December. Did you know? Coal tits keep in contact with their flock when searching for food, with constant 'dee' or 'seesee' calls.

Andy Rouse / Coal Tit (Periparus ater) perched in snow, Wales, UK, January

Ross Hoddinott / Coal tit {Periparus ater} Cornwall. UK

Rolf Nussbaumer / Coal Tit {Periparus ater} adult landing on branch of spruce tree, Switzerland

Kim Taylor / Coal tit (Periparus ater) in flight with beechmast. UK

Danny Green / Coal Tit (Periparus / Parus ater) perched with lichen. Scotland, February.

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) perched on branch in snow, Scotland, UK, December

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) perched on branch in snow, Scotland, UK, December

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) perched on branch in snow, Scotland, UK, December

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) perched on branch in snow, Scotland, UK, December

Ben Hall / Coal tit (Periparus ater) perched on moss covered twig, Cheshire, UK

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) adult in winter, perched on twig with frozen crab apples, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) adult in winter, perched on twig with frozen crab apples, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Coal tit (Periparus ater) adult perched in winter, Scotland, UK, December

Mark Hamblin / 2020VISION / Great tit (Parus major) perched and Coal tit (Periparus ater) in flight, Scotland, UK, January

Mark Hamblin / 2020VISION / Great tit (Parus major) landing on perch, Scotland, UK, January

David Kjaer / Coal Tit (Periparus ater) bathing in stream. Wiltshire, UK, April.

Peter Cairns / Coal tit (Periparus ater) reflected in garden pond, Scotland, UK

Ernie Janes / Coal Tit (Periparus ater) perched with catkins in winter, UK

David Kjaer / Coal Tit (Periparus ater) bathing in stream. Wiltshire, UK, March.

Peter Cairns / Coal Tits (Periparus ater) on feeder in winter. Glenfeshie, Scotland, February.

Bernard Castelein / Coal Tit (Periparus ater) on a snowy stump. Brasschaat, Belgium, December.

Bernard Castelein / Coal Tit (Periparus ater) perched on a branch. Brasschaat, Belgium, December.

Markus Varesvuo / Coal tit (Periparus ater) clinging to conifer twig flapping wings, Finland, September

Colin Varndell / Coal tit (Periparus ater) perched on branch in winter. Dorset, UK, December

Colin Varndell / Coal tit (Periparus ater) perched on branch, in late autumn. Dorset, UK November

Alan Williams / Coal Tit (Periparus ater) singing in woodland, North Wales, UK, May

Paul Hobson / Cole tit in flight, (Periparus ater) South Yorkshire, England, UK. March.

Stephen Dalton / Coal tit (Periparus ater) in flight, about to land on branch covered with bracket fungi, UK controlled conditions

Stephen Dalton / Coal tit ( Periparus ater) in flight, leaving nest in mossy tree trunk. England, UK

Alan Williams / Coal Tit (Periparus ater) calling on lichen covered branch in woodland, North Wales, UK, March

Alan Williams / Coal Tit (Periparus ater) perched on conifer branch in woodland, North Wales, UK, March

Alan Williams / Coal Tit (Periparus ater) perching on lichen covered branch in woodland, North Wales, UK, March

Andy Rouse / Coal tit (Periparus ater) perched on branch, UK

Andy Rouse / Coal Tit (Periparus ater) perched in snow, Wales, UK, January

Paul Hobson / Coal tit (Periparus ater) on lichen covered branch in snow, South Yorkshire, UK

Paul Hobson / Coal tit (Periparus ater) on lichen covered branch in snow, South Yorks, UK

Alan Williams / Coal tit (Periparus ater) in garden, Cheshire, UK, January

Guy Edwardes / Coal tit (Periparus ater) perched on lichen covered branch, Devon, England, March

Guy Edwardes / Coal tit (Periparus ater) perched, Devon, England, March

David Kjaer / Coal tit (Periparus ater) on bramble. Worcestershire, England.

Dave Bevan / Coal tit (Periparus ater) perched on moss, UK

Ian McCarthy / Coal tit {Periparus ater} flapping wings on lichen covered branch in snow, Abernethy, Scotland, UK

Ian McCarthy / Coal tit {Periparus ater} flapping wings on lichen covered branch in snow, Abernethy, Scotland, UK

Rolf Nussbaumer / Coal Tit (Periparus ater) adult perched on frost covered conifer, minus 15 Celsius, Switzerland, December

Andy Sands / Coal tit (Periparus ater) perched on Larch cones, West Sussex, England, UK.

Andy Sands / Coal tit (Periparus ater) perched amongst spring blossom, Buckinghamshire, England, UK.

Roger Powell / Coal tit {Periparus ater} on mossy tree stump Northumberland, UK

Roger Powell / Coal tit {Periparus ater} on tree stump, Northumberland, UK

Kim Taylor / Coal Tits (Periparus ater) flying with peanuts in their beaks, digital composite, Surrey, UK

Roger Powell / Coal Tit (Periparus ater) on mossy stump, Northumberland, UK

Steve Knell / Coal tit {Periparus ater} Norway 2006

Mike Wilkes / Coal tit {Periparus ater} on fir tree in snow, Scotland, UK

Elio Della Ferrera / Coal Tit {Periparus ater} feeding from hand, Switzerland

Andy Sands / Coal Tit {Periparus ater} perching on branches with Larch cones, West Sussex, UK.

DAVID TIPLING / Coal Tit {Periparus ater} perching on frosty branch, Scotland, UK.

David Kjaer / Coal tit {Periparus ater} on Scot's Pine, Deeside, Scotland UK

David Kjaer / Coal Tit (Periparus ater) on Pussy Willow (Salix), Wiltshire, UK

David Kjaer / Coal Tit (Periparus ater) on Scots Pine, Deeside, Scotland, UK

WILLIAM OSBORN / Coal Tit on perched on stump (Parus alter) Worcestershire. UK

Pete Cairns / Coal Tit {Periparus ater) in winter. Cairngorms National Park, Scotland, UK.

Pete Cairns / Coal Tit {Periparus ater} perched on winter larch in pine forest, Cairngorms, Scotland, UK.

Hans Christoph Kappel / Coal tit {Periparus ater} perched on twig, Europe.

Kim Taylor / Coal Tit {Periparus ater} flying in to take a caterpillar from a twig. UK. Digital composite.

Rolf Nussbaumer / Coal tit on lichen covered bark {Periparus ater} Switzerland.

Mike Read / Coal tit on fat feeder {Periparus ater} Hampshire, England

Dave Watts / Coal tit {Periparus ater} on Willow catkins {Salix sp} in snow, UK

Dave Watts / Coal tit {Periparus ater} on Japonica flowers in spring, UK

Chris O'Reilly / Coal tit {Periparus ater} Scotland, UK

Dave Watts / Coal tit {Periparus ater} on conifer in snow, UK

David Kjaer / Coal tit {Periparus ater} on willow. Wiltshire, UK, early spring.

David Kjaer / Coal tit {Periparus ater} on Japonica plant. Wiltshire, UK, early spring.

Niall Benvie / Coal tit on nut feeder, Scotland, UK

WILLIAM OSBORN / Portrait of Coal tit (Periparus ater) Wiltshire UK

Pete Cairns / Coal tit {Periparus ater} Highlands, Scotland, UK

TJ Rich / Coal tit perched on hawthorn and holly {Periparus ater} Wiltshire UK

Mike Read / Coal tit {Periparus ater} perched, New Forest National Park, Hampshire, UK, January

Mike Read / Coal tit {Periparus ater} perched, New Forest National Park, Hampshire, UK, January

Mike Read / Coal tit {Periparus ater} perched, New Forest National Park, Hampshire, UK, January

Roger Powell / Coal Tit {Periparus ater} perched, Northumberland, UK

Nature Production / Coal Tit {Passer montanus} perched in Maple tree, Yatsugatake, Nagano, Japan, January