Danny Green / Hazel Dormouse (Muscardinus avellanarius) hibernating amongst leaves and acorns. Captive. Leicestershire, UK, October.

Marie Read / Blue jay (Cyanocitta cristata) holding an acorn in its bill whilst perched on tree stump, with autumn foliage, New York, USA, October.

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

Dave Bevan / Large white (Pieris brassicae) caterpillars eating Broccoli (Brassica oleracea) leaves, with Small white (Pieris rapae) caterpillars, Carmarthenshire, Wales, UK. September.

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

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

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

Jack Dykinga / Fallen Quaking aspen (Populus tremuloides) leaves on wood, autumn, Dixie National Forest, Utah, USA, October.

Sandra Bartocha / European beech tree (Fagus sylvatica). in woodland, Serrahn, Muritz-National Park, World Natural Heritage site, Germany, Europe. October 2015.

Sandra Bartocha / Sun rays shining through European beech woodland (Fagus sylvatica). Serrahn, Muritz-National Park, World Natural Heritage site, Germany, Europe. November 2015.

Floris van Breugel / Young California fan palm (Washingtonia filifera) in sunshine among older palms in a remote oasis in Anza-Borrego Desert State Park, California, USA March

Floris van Breugel / Close up of (Agave) plant leaves, California, USA November

Niall Benvie / Leaves emerging on European beech tree (Fagus sylvatica) Angus, Scotland, UK. May.

Andres M. Dominguez / Common stonechat (Saxicola torquata) perched on bramble, Sierra de Grazalema Natural Park, southern Spain, November.

Andres M. Dominguez / Frozen Elmleaf blackberry (Rubus ulmifolius) in a small pond, Sierra de Grazalema Natural Park, southern Spain, January.

Andres M. Dominguez / Bacteria (Lepthotryx discophora) causing iridescent patterns and White willow tree leaf (Salix alba) in river, Sierra de Grazalema Natural Park, southern Spain, November.

Andres M. Dominguez / Dove's-foot crane's-bill leaf (Geranium molle) and algae in ice with air bubbles, Sierra de Grazalema Natural Park, southern Spain, February.

Dong Lei / Plants growing in woodland (Kingdonia uniflora) Jiuzhaigou National Nature Reserve, Sichuan Province, China, August.

Pete Oxford / Tea picker, collecting Tea leaves (Camelia sinensis) wearing large straw hat, Assam, North East India, October 2014.

Cyril Ruoso / Woman with baby collecting Madagascar periwinkle (Catharanthus roseus) flowers and leaves, used in herbal medicine, and containing molecules which are used in the treatment of leukemia cancer. Berenty...

Sandra Bartocha / European beech (Fagus sylvatica) trees with last leaves in autumn and first snow on the ground. Serrahn, Muritz-National Park, World Natural Heritage site, Germany, November.

Floris van Breugel / A view of Pony Tail falls with Devil's Club (Oplopanax horridus) leaves in the foreground in the Columbia River Gorge, Oregon, USA. July 2011.

Alex Hyde / Ash tree leaves (Fraxinus excelsior) photographed in mobile field studio against a white background. Derbyshire, UK. September.

Juan Carlos Munoz / Iberian black pig foraging in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Floris van Breugel / Emerging spring leaves adorn the mossy trees - Vine Maple (Acer circinatum) and Alder (Alnus rubra) in Mt Baker - Snoqualmie National Forest. Washington. April 2013

Floris van Breugel / Japanese maple (Acer palmatum) leaves floating in a small pond in late autumn in Seattle's Washington Park Arboretum. Washington USA

Theo Bosboom / Beech (Fagus sp) leaves in autumn, Angerenstein park, Arnhem, the Netherlands, November 2011

Willem Kolvoort / Water lily (Nymphaea rudgeana) leaves viewed from below in a black water creek. Suriname, October.

Colin Varndell / Fresh Wych elm (Ulmus glabra) leaves in spring. Dorset, UK May

Niall Benvie / Bramble (Rubus plicatus) leaves and stem against white background. France, August.

Gary K. Smith / Woodland floor with purple fungi Amethyst Deceiver (Laccaria amethystina), and fallen seed cases and fruit of Sweet Chestnut tree (Castanea savita) Norfolk, UK, October

Alex Hyde / Pine seedlings (Pinus sp) with seed cases attached, Nordtirol, Austrian Alps, Austria, June.

Nigel Cattlin / Walnut (Juglans regia), developing leaves , necrotic with frost damage. Berkshire, England, UK. May.

Nigel Cattlin / Pear leaf blister mite (Eriophyes pyri) damage to Pear (Pyrus sp) leaves. Berkshire, England, UK. May.

Nigel Cattlin / Pear leaf blister mite (Eriophyes pyri) damage to Pear (Pyrus sp) leaves and young fruit. Berkshire, England, UK. May.

Nigel Cattlin / Iron deficiency symptoms with interveinal chlorosis on cultivated Bougainvillea (Bougainvillea sp) leaves.

Nigel Cattlin / Iron deficiency symptoms with interveinal chlorosis on cultivated Bougainvillea (Bougainvillea sp) leaves.

Nigel Cattlin / Powdery mildew (Erysiphales) developing on Sweet William (Dianthus barbatus) leaves. Berkshire, England, UK. October.

Nigel Cattlin / Powdery mildew (Erysiphales) developing on Sweet William (Dianthus barbatus) leaves. Berkshire, England, UK. October.

Nigel Cattlin / Horse chestnut leaf miner (Cameraria ohridella) larval damage to Horse chestnut (Aesculus hippocastanum) leaves. Berkshire, England, UK. August.

Nigel Cattlin / Banana (Musa x paradisiaca) cross section showing tightly packed leaves is pseudostem.

Nigel Cattlin / Lupin (Lupinus sp) leaves with powdery mildew caused by Fungus (Erysiphales). Cultivated in garden, Berkshire, England, UK. June.

Nigel Cattlin / Common vetch (Vicia sativa) with Red ant (Myrmica rubra) on bud. Berkshire, England, UK. June.

Nigel Cattlin / Pear leaf blister mite (Eriophyes pyri) damage to Pear (Pyrus sp) leaves. Berkshire, England, UK. June.

Nigel Cattlin / Hairy bittercress (Cardamine hirsuta) leaf rosette with pinnate leaves, growing as garden weed. Berkshire, England, UK. May.

Nigel Cattlin / Sweet bay (Laurus nobilis) leaves with overwintering cold or wind damage. Berkshire, England, UK. April.

Nigel Cattlin / Fat-hen (Chenopodium album) seedling with cotyledons and four true leaves, annual arable weed.

Nigel Cattlin / Maize (Zea mays) seedling with roots and early leaves, above and below ground.

Nigel Cattlin / Maize (Zea mays) seedling with roots and early leaves, above and below ground.

Nigel Cattlin / Cabbage (Brassica sp) with feeding damage caused by Wood pigeon (Columba palumbus). Berkshire, England, UK. April.

Nigel Cattlin / Apple (Malus domestica) buds swelling prior to leaves and flowers emerging in spring. Berkshire, England, UK. April.

Nigel Cattlin / Broad bean (Vicia faba) young plant with early leaves and roots, uprooted and germinated seed split to show food reserve.

Nigel Cattlin / Broad bean (Vicia faba), young plant with germinated seed, early leaves and roots, above and below ground.

Nigel Cattlin / Cleavers (Galium aparine) seedling with cotyledons and early leaf rosettes, growing as garden weed.

Nigel Cattlin / Lady finger / Sugar banana (Musa acuminata) unripe bunch growing amongst leaves. Bangkok, Thailand.

Nigel Cattlin / Medlar (Mespilus germanica) fruit, senescing leaves in background. Berkshire, England, UK. November.

Nigel Cattlin / Creeping thistle (Cirsium arvense) with chlorosis caused by PST bacteria (Pseudomonas syringae pv tagetis). Dorset, England, UK. October.

Nigel Cattlin / Creeping thistle (Cirsium arvense) with chlorosis caused by PST bacteria (Pseudomonas syringae pv tagetis). Dorset, England, UK. October.

Nigel Cattlin / Chickweed (Stellaria media) flowers amongst leaves, an annual arable weed. Berkshire, England, UK. August.

Nigel Cattlin / Two-spot spider mite (Tetranychus urticae) grazing damage to Tomato (Solanum lycopersicum) leaves. Cultivated in greenhouse, Berkshire, England, UK. September.

Nigel Cattlin / Sunflower (Helianthus annuus) seedling with cotyledons expanding, leaves still trapped by pericarp. Above and below ground. Sequence 3/5.

Nigel Cattlin / Flea beetle (Phyllotreta nigripes) feeding damage to leaves of Sweet alyssum (Lobularia maritima). Berkshire, England, UK. August.

Nigel Cattlin / Flea beetle (Phyllotreta nigripes) feeding damage to leaves of Sweet alyssum (Lobularia maritima). Berkshire, England, UK. August.

Nigel Cattlin / Large white butterfly (Pieris brassicae) caterpillars and frass on damaged Nasturtium (Tropaeolum majus) leaf. Berkshire, England, UK. August.

Nigel Cattlin / Antirrhinum or snapdragon rust (Puccinia antirrhini) pustules in a circular lesion on the underside of Snapdragon (Antirrhinum sp) leaf, August.

Nigel Cattlin / Flea beetle (Phyllotreta sp) feeding damage to Sweet alyssum (Alyssum maritimum) leaves. Berkshire, England, UK. July.

Nigel Cattlin / Creeping thistle (Cirsium arvense) with leaf chlorosis caused by Bacteria (Pseudomonas syringae pv tagetis). Berkshire England, UK. June.

Nigel Cattlin / Powdery mildew (Podosphaera pannosa) on Rose (Rosa sp) leaves. Cultivated in garden, Berkshire, England, UK. June.

Nigel Cattlin / Apple (Malus domestica) bud burst, flower buds opening surrounded by fresh green leaves. Berkshire, England, UK. April.

Nigel Cattlin / Apple (Malus domestica) flower buds and fresh green leaves following bud burst, Berkshire, England, UK. April.

Nigel Cattlin / Broadleaf carpetgrass (Axonopus compressus), prostrate plants in lawn. Bangkok, Thailand .

Colin Varndell / Beech (Fagus sylvatica), young leaves. Dorset, England, UK. May.

Tony Heald / Two women carrying bag of freshly harvested Tea (Camellia sinensis) leaves. Carolyn Tea Estate, Mango Range, The Nilgiris, Tamil Nadu, India. February.

Tony Heald / Bags of freshly harvested Tea (Camellia sinensis) leaves. Carolyn Tea Estate, Mango Range, The Nilgiris, Tamil Nadu, India. 2014.

Tony Heald / Woman carrying bag of Tea (Camellia sinensis) leaves in sack on head. Carolyn Tea Estate, Mango Range, The Nilgiris, Tamil Nadu, India. 2014.

Tony Heald / Woman harvesting Tea (Camellia sinensis) with leaf plucking shears, on plantation. Carolyn Tea Estate, Mango Range, The Nilgiris, Tamil Nadu, India. 2014.

Tony Heald / Tea (Camellia sinensis) leaves in sacks, women counting bags and picking in background. Carolyn Tea Estate, Mango Range, The Nilgiris, Tamil Nadu, India. 2014.

Bernard Castelein / Oak leaves (Quercus robur), Peerdsbos, Brasschaat, Belgium. December

Chris Mattison / Giraffe-necked weevil (Trachelophorus giraffa) egg case wrapped in the leaves of its food plant (Dichaetanthera sp). Ranomafana,National Park, Madagascar.

Adrian Davies / Pin oak (Quercus palustris) leaves, fallen in autumn. October.

Nigel Cattlin / Red spider mite (Panonychus ulmi) webbing on young Apple (Malus domestica) branch, damage to leaves.

Nigel Cattlin / White dead-nettle (Lamium album) seedling with two cotyledons and two true leaves. A garden and arable agricultural weed.

Nigel Cattlin / Sensitivity plant (Mimosa pudica) shown before and after touching the sensitive leaves.

Nigel Cattlin / Two spotted spider mite (Tetranychus urticae) webbing and damage to leaves of Green bean (Phaseolus vulgaris) plant. England, UK.

Ernie Janes / Horse chestnut (Castanea sativa) new leaves.

Nigel Cattlin / Chickweed (Stellaria media) seedling with two cotyledons and two true leaves developing. Considered an agricultural weed.

Nigel Cattlin / Californian red scale (Aonidiella aurantii) infestation on Lemon (Citrus limon) wood. Native to China. Sicily, Italy. October.

Nigel Cattlin / Apple (Malus domestica) tree leaves with interveinal chlorosis, symptom of iron deficiency.

Nigel Cattlin / Sickle senna (Senna tora) seedlings, self seeding arable weeds near leaves of parent plant. Mississippi, USA.

Nigel Cattlin / Apple (Malus domestica) branch with fruits and leaves. Leaves exhibiting interveinal chlorosis, symptom of iron deficiency.

Nigel Cattlin / Codling moth (Cydia pomonella) caterpillar exit hole on young Apple (Malus domestica) fruit.

Heather Angel / Allegheny spurge (Pachysandra procumbens) leaves emerging amongst flowers in garden. Flowers emit spicy fragrance. Surrey, England, UK. Native to Asia.

Heather Angel / Sun bromeliad (Fascicularia bicolor). Central leaves turn red to attract hummingbird pollinators before flowers open. Cultivated in garden. Surrey, England, UK.

Heather Angel / Sunbeams shining through Bamboo (Bambusidae) leaves. Shunan Zhuhai National Park, Sichuan Province, China.

Heather Angel / Euphorbia (Euphorbia jolkinii) leaves turning red in autumn. Napa Hai, Shangri-la, Yunnan Province, China. September.