Claudio Contreras / California condor (Gymnogyps californianus), two peched in tree, adult and juvenile. California condor recovery program, Sierra de San Pedro Martir National Park, Baja California Peninsula, Mexico.

Sven Zacek / Ural owl (Strix uralensis) perched in tree sleeping, viewed through a fence, Estonia.

Bernard Castelein / Coquerel's sifaka (Propithecus coquereli) in tree, relaxing, Ankarafantsika National Park, Madagascar

Bernard Castelein / Silky sifaka (Propithecus candidus) in tree, Marojejy National Park, Madagascar. Critically endagered species.

Heather Angel / Honey bee (Apis mellifera) forages on pollen in Apple (Malus domestica) flower, collecting pollen in pollen basket. In garden, Surrey, England, UK. May.

Oscar Dewhurst / Red deer (Cervus elaphus) stag roaring, silhouetted under trees at sunrise. Bushy Park, London, UK. September

Ernie Janes / Beech trees (Fagus sylvatica) at night in winter, with lamp post illuminating the woodland. Felbrigg Woods, Norfolk, England, UK. January.

Nigel Cattlin / Immature caterpillar of a codling moth (Cydia pomonell) eating its way through a gallery in a ripening apple fruit, Berkshire, July

Nigel Cattlin / Peach leaf curl (Taprina deformans) fungal disease distortion of leaves on a young Peach tree, Berkshire, September.

John Shaw / Poplar (Populus sp.) tree plantation, hybrid species, in autumn, Boardman Tree Farm, near Irrigon, Oregon, USA. October.

John Shaw / Pine tree (Pinus sp) in winter, Bryce Canyon National Park, Utah, USA, January.

Andy Rouse / Cuckoo (Cuculus canorus) perched on conifer in habitat. Wales, UK. May

Andy Rouse / Cuckoo (Cuculus canorus) in habitat, Wales, UK, May.

Nick Upton / Captive reared juvenile White stork (Ciconia ciconia) in flight over the Knepp Estate soon after release, Sussex, UK, August 2019.

Nick Upton / Captive reared juvenile White stork (Ciconia ciconia) with a GPS tracker on its back in flight over the Knepp Estate soon after release, Sussex, UK, August 2019.

Jack Dykinga / Rainbow over Long Canyon with fall coloured Cottonwood (Populus) trees against canyon walls, Burr Trail, Grand Staircase-Escalante National Monument, Utah, USA, October 2018.

SCOTLAND: The Big Picture / Creative impression of Silver birch (Betula pendula) foliage, Creagellachie NNR, Cairngorms National Park, Scotland, UK.May

Marie Read / Common redpoll (Carduelis flammea), male perched in alder (Alnus rugosa) during a snowstorm in winter, New York, USA, January.

Ernie Janes / Bluebells (Hyacinthoides non-scripta) and Beech (Fagus sylvatica) leaves, England, UK, May.

Sven Zacek / Mist over bog with conifers in pre-dawn light. Endla Nature Reserve, Jogevamaa, Central Estonia. June 2016.

Guy Edwardes / Beech (Fagus sylvatica) woodland canopy in winter, Cranborne Chase, Dorset, England, UK.

Guy Edwardes / Beech (Fagus sylvatica) woodland canopy in winter, Cranborne Chase, Dorset, England, UK.

SCOTLAND: The Big Picture / Ancient Scots pine (Pinus sylvestris) amongst flowering Common heather / Ling (Calluna vulgaris). Rothiemurchus Forest, Cairngorms National Park, Scotland, UK.

Bruno D'Amicis / Red fox (Vulpes vulpes) walking along fallen trunk of old Beech (Fagus sylvatica) tree, Coppo del Principe old-growth beech forest in autumn. Abruzzo, Lazio and Molise National Park / Parco Nazionale...

Bruno D'Amicis / Beech (Fagus sylvatica) tree seedlings in old growth forest in spring, Abruzzo, Lazio and Molise National Park / Parco Nazionale d'Abruzzo, Lazio e Molise UNESCO World Heritage Site Italy. May

Bruno D'Amicis / Beech (Fagus sylvatica) tree seedlings in old growth forest in spring, Abruzzo, Lazio and Molise National Park / Parco Nazionale d'Abruzzo, Lazio e Molise UNESCO World Heritage Site Italy. May

David Allemand / Birch tree (Betula sp) next to waterfall, Iceland. Runner-Up in the Plants category of the International OasisPhotoContest 2018

Guy Edwardes / The Dark Hedges, Stranocum, Co. Antrim, Northern Ireland, September 2010.

Guy Edwardes / River Fowey at Golitha Falls, Bodmin Moor, Cornwall, England, UK. May 2010.

Guy Edwardes / River Fowey flowing through Beech (Fagus sylvatica) woodland, Golitha Falls, Bodmin Moor, Cornwall, England, UK. May 2010.

Guy Edwardes / Beech (Fagus sylvatica) avenue, Moor Crichel, Dorset, England, UK. May 2017.

Guy Edwardes / Beech (Fagus sylvatica) avenue, Moor Crichel, Dorset, England, UK. May 2017.

Guy Edwardes / Beech (Fagus sylvatica) avenue, Kingston Lacy, Wimborne, Dorset, England, UK. December 2010.

Guy Edwardes / Beech (Fagus sylvatica) avenue, Kingston Lacy, Wimborne, Dorset, England, UK. December 2010.

Guy Edwardes / Colmer's Hill, Bridport, Dorset, England, UK. April 2016.

Guy Edwardes / Trees reflected in Loch Tummel, Perthshire, Scotland, UK. October, 2014.

Bernard Castelein / Birch tree (Betula pendula) covered in hoar frost, Groot Schietveld, Wuustwezel, Belgium, December 2007.

Bernard Castelein / Beech woodland (Fagus sylvatica) Peerdsbos, Brasschaat, Belgium

Bernard Castelein / Beech woodland (Fagus sylvatica) with sun rays shining through, black and white image. Peerdsbos, Brasschaat, Belgium

Bernard Castelein / Beech tree (Fagus sylvatica) showing roots, Peerdsbos, Brasschaat, Belgium

Bernard Castelein / Beech woodland (Fagus sylvatica) Peerdsbos, Brasschaat, Belgium, November.

Bernard Castelein / Scots pine tree (Pinus sylvestris) at sunrise, Klein Schietveld, Brasschaat, Belgium. September.

Bernard Castelein / Scots pine trees (Pinus sylvestris) in wetlands at dawn with the moon, Klein Schietveld, Brasschaat, Belgium

Bernard Castelein / Scots pine trees (Pinus sylvestris) on island in wetlands, Klein Schietveld, Brasschaat, Belgium

Bernard Castelein / Scots pine tree (Pinus sylvestris) with sunrays at sunrise. Klein Schietveld, Brasschaat, Belgium.

Steve Downer / Timelapse of Sycamore tree (Acer pseudoplatanus) leaves developing, UK. March. Controlled conditions.

Bernard Castelein / Scot's pine tree (Pinus sylvestris) at dawn, Klein Schietveld, Brasschaat, Belgium, October 2013.

Bernard Castelein / Oak (Quercus robur) in Heather (Calluna vulgaris) at sunrise, Klein Schietveld, Brasschaat, Belgium

Pal Hermansen / Aerial shot of a coniferous forest after heavy snowfall, camera ascends into fog, Akershus, Norway, January 2018.

Pal Hermansen / Aerial shot of trees casting long shadows in low winter sunlight, Golsfjell, Buskerund, Norway, January 2018.

Pal Hermansen / Aerial shot of patterns in a frozen lake, Lake Langen, Akershus, Norway, December 2017.

Pal Hermansen / Aerial shot of mist over a coniferous forest in winter, Langen Lake, Akershus, Norway, January 2018.

Jack Dykinga / Western sword fern (Polystichum munitum) and Big leaf maple (Acer macrophyllum) trees that are covered with moss, Hoh Temperate Rainforest, Olympic National Park, Washington, USA. June 2017.

Konrad Wothe / Pair of Rosalia longicorns (Rosalia alpina) climbing up a Beech tree (Fagus sylvatica) whilst mating, Upper Bavaria, Germany, August.

Ross Hoddinott / Ancient oak tree (Quercus robur), Marsland Mouth, Devon Wildlife Trust, Devon, UK. April 2017.

Jack Dykinga / Agave (Agave utahensis) close up of spines with Pinyon pine cone (Pinus edulis) wedged amongst them. Grand Canyon-Parashant National Monument, Arizona, USA

Jack Dykinga / Fremont cottonwood trees (Populus fremontii) with autumnal leaves, Coyote Gulch,Grand Staircase-Escalante National Monument, Utah, USA.

Jack Dykinga / Cottonwood (Populus fremontii) trees in autumn at sunset, forming a sinuous line of yellow trees. Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah, USA, October.

Jack Dykinga / Cottonwood (Populus fremontii) trees forming a sinuous line of yellow trees at sunset, in Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah, USA

Jack Dykinga / Ponderosa pine (Pinus ponderosa) growing in Grand Staircase-Escalante National Monument, Utah, October 2014.

Ingo Arndt / White-handed gibbon {Hylobates lar} feeding in {Ficus sp} tree Khao Yai NP Thailand

Philippe Clement / Panning shot of silhouetted pine trees and early morning mist rising from a lake, Loch Garten, Strathspey, Scotland, UK, September.

Terry Whittaker / Red squirrel (Sciurus vulgaris) leaping between Scots pine tree (Pinus sylvestris)s, lands on camera, Black Isle, Ross and Cromarty, Scotland, February.

Philippe Clement / Panning shot of row of beech trees in autumn forest, Heidebos, Wachtebeke, Belgium, November

Dave Bevan / Female Blackbird (Turdus merula) feeding chicks at nest, removing faecal sacs, Carmarthenshire, Wales, UK, June.

Dave Watts / Koala (Phascolarctos cinereus), eating Eucalyptus leaves, Victoria, Australia.

SCOTLAND: The Big Picture / Close up of a Red deer (Cervus elaphus) stag feeding in snow, Cairngorms National Park, Scotland, UK, February.

SCOTLAND: The Big Picture / Scots pine trees (Pinus sylvestris) in heavy snowfall, Cairngorms National Park, Scotland, UK, January.

Nick Upton / Eurasian beaver (Castor fiber) at night, chewing bark and climbing along a felled tree, Devon Wildlife TrustÕs Devon Beaver Project enclosure, Devon, England, UK, March.

Nick Upton / Flock of Jackdaws (Corvus mondedula) taking off from their roost site, Gloucestershire, England, UK, December.

Andy Rouse / Giant panda (Ailuropoda melanoleuca) cub aged five months falling asleep in a tree in a breeding centre, Chengdu, China. Captive.

Andy Rouse / Giant panda (Ailuropoda melanoleuca) cub aged five months stuck after climbing a tree in a breeding centre, Chengdu, China. Captive.

Alastair MacEwen / Timelapse of frost forming on European beech (Fagus sylvatica) leaves, controlled conditions, Somerset, England, UK.

Ingo Arndt / Bark beetle (Scolytinae) galleries in dead spruce tree (Picea abies), Bayerischer Wald / Bavarian Forest National Park, Germany., June.

Ingo Arndt / Floodplain with Pandanus palms under storm clouds, Kakadu National Park, Northern Territory, Australia, December 2010

Ingo Arndt / Christmas Island Red Crabs (Gecarcoidea natalis) crossing road in huge numbers during annual migration, Christmas Island, Indian Ocean, Australian Territory

Ingo Arndt / Quiver Tree (Aloe dichotoma), Namib Desert, Namibia.

Ingo Arndt / Quiver Tree (Aloe dichotoma), Namib Desert, Namibia.

Ingo Arndt / Looking up through the canopy of Eucalyptus plantation, Rwanda, Africa

Ingo Arndt / Rainforest slope Mount Bisoke (3711m), Mountain gorilla habitat (Gorilla gorilla beringei), Parc National des Volcans, Rwanda

Ingo Arndt / Monarch butterflies (Danaus plexippus) flying amongst trees, overwintering colony, Michoacan, Mexico

Ingo Arndt / Golden monkey (Cercopithecus mitis kandti) looking down from tree, Parc National des Volcans, Rwanda

Ingo Arndt / Monarch butterflies (Danaus plexippus) flying in warmth of midday sun, overwintering colony in Michoacan, Mexico

Ingo Arndt / Tropical rainforest / cloud forest scenic, Monteverde National Park, Costa Rica

Ingo Arndt / Morning mist over coniferous woodland, Harz National Park, Saxony, Germany

Francois Savigny / Leopard coming down tree {Panthera pardus} Kalahari National Park, Botswana

Ingo Arndt / Fat dormouse in flowering tree {Glis glis} Germany

Ingo Arndt / Trees covered with snow, Brocken, Harz NP, Germany. Sunrise sequence

Ingo Arndt / Trees covered with snow, Brocken, Harz NP, Germany

Ingo Arndt / Trees covered with snow Sunrise sequence, Brocken, Harz NP, Germany

Francois Savigny / Spectacled bear climbing tree {Tremarctos ornatus} Peru, South America

Ingo Arndt / Tea plantation near Kandy, Sri Lanka

Ingo Arndt / European beech seedling seed leaves {Fagus sylvatica} Germany Sequence 2/2

Ingo Arndt / Hedgehog investigates hollow trunk {Erinaceus europaeus} Germany

Ingo Arndt / High angle shot of Redwood tree {Metasequoia sp} Redwood NP, California, USA

SCOTLAND: The Big Picture / Ancient Scots pine tree (pinus sylvestris) with dead low branches, in evening light. Cairngorms National Park, Highlands, Scotland, UK. February 2008.