Solvin Zankl / Great capricorn beetle (Cerambyx cerdo) on Oak tree (Quercus sp) Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, July.

Solvin Zankl / English oak tree (Quercus robur) in moonlight, Nauroth, Germany, February.

Solvin Zankl / English oak tree (Quercus robur) silhouetted against orange sky with star trails, Nauroth, Germany, October.

Solvin Zankl / Stag beetle (Lucanus cervus) silhouetted against oak tree leaf. Elbe, Germany, June.

Solvin Zankl / The Scarce Merveille du Jour (Moma alpium) caterpillar with urticating hairs on English oak tree (Quercus robur) leaf, Stettin Lagoon, Bay of Szczecin, Germany, August.

Solvin Zankl / Rhinoceros beetle (Oryctes nasicornis) on branch of tree, Germany

Konrad Wothe / Tropical rainforest at the western slopes of the Ecuadorian Andes, northern Ecuador.

Konrad Wothe / Tropical rainforest, Rio Papallacta, northern Ecuador.

Konrad Wothe / Red orchid in tropical rainforest, northern Ecuador.

Konrad Wothe / Tropical rainforest at the western slopes of the Ecuadorian Andes, northern Ecuador.

Konrad Wothe / Tropical rainforest, northern Ecuador.

Konrad Wothe / Cotopaxi volcano, National Park, Ecuador.

Konrad Wothe / Bugs on Heliconia flower, Coreidae, Rainforest at Tambopata river, Tambopata National Reserve, Peru.

Konrad Wothe / Rainforest at Sandoval Lake, Tambopata National Reserve, Peru.

Solvin Zankl / Woodlice (Ligidium hypnorum) on Oak tree (Quercus) leaf litter, Westensee, Kiel, Germany, April.

Solvin Zankl / Nature photographer Solvin Zankl taking close up images of animals on Oak tree (Quercus) leaves. Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, June 2013.

Solvin Zankl / Oak trees (Quercus sp) in snowfall. Westensee, Kiel Germany, February.

Solvin Zankl / Acorn weevil (Curculio glandium) taking off from Oak tree (Quercus) leaf, Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, June.

Solvin Zankl / Ice crystal on Oak tree (Quercus sp) branch. Westensee, Kiel Germany, March.

Solvin Zankl / Slime mould (Physarum citrinum) on Oak tree (Quercus) leaf litter, Klepelshagen Strasburg (Uckermark), Germany

Solvin Zankl / European toad (Bufo bufo) juvenile, among fungi and moss on Oak tree (Quercus) root, Kaltenhofer Moor, Kiel, Germany, September.

Solvin Zankl / Moss mites (Damaeus onustus) on fallen Oak tree leaf (Quercus sp) Westensee, Kiel, Germany.

Solvin Zankl / Nature photographer Solvin Zankl taking close up images of animals on oak leaves. Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, June.

Solvin Zankl / Nature photographer Solvin Zankl taking photographs in an old Oak. Belau, Germany

Solvin Zankl / Nature photographer Solvin Zankl taking close up images of the Stag beetle (Lucanus cervus). Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, June.

Solvin Zankl / Two Boys in Oak tree (Quercus) in autumn, Edersee, Germany, October 2014.

Solvin Zankl / English oak tree (Quercus robur) gnarled branch, Kellerwald, Hesse Germany, November.

Solvin Zankl / Springtail (Dicyrtomina ornata) on fallen oak tree leaf, Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Middle spotted woodpecker (Leiopicus medius) perched on oak tree. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Solvin Zankl / Land caddisfly larva (Enoicyla pusilla) on fallen oak tree leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Maidens blush moth (Cyclophora punctaria) caterpillar at end of oak tree leaf, Germany. September.

Solvin Zankl / English oak tree leaf (Quercus robur) with autumn colours. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, November.

Solvin Zankl / Woodlouse (Armadillidium pulchellum) Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Solvin Zankl / English oak tree (Quercus robur) in autumn colours, with spider web. Kellerwald, Hesse, Germany, November.

Solvin Zankl / Pipistrelle bat (Pipistrellus pipistrellus) roosting in oak tree. Germany, September.

Solvin Zankl / Moss mite (Oribatida) on fallen oak tree leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Solvin Zankl / Eurasian jay (Garrulus glandarius) with oak tree acorn. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Solvin Zankl / English oak tree (Quercus robur) woodland in autumn colours, Kellerwald, Hesse, Germany, November.

Solvin Zankl / Gall wasp (Cynips quercusfolii) emerging from gall in oak. Germany. October.

Solvin Zankl / Pseudoscorpion (Chelifer cancroides) on fallen oak tree leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Solvin Zankl / Great spotted woodpecker (Dendrocopos major) Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, November.

Solvin Zankl / Viviparous lizard (Zootoca vivipara) hunting for insects in holes of oak tree, Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, September.

Solvin Zankl / Feather of Eurasian jay (Garrulus glandarius) on white background. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Fly larvae (Fannia sp.) on oak tree leaves. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Solvin Zankl / Dr. Rainer Wirth leaning out of tower built to research English oak trees (Quercus robur) Kaiserslautern University of Technology, Germany. October.

Solvin Zankl / Tawny owl (Strix aluco) in oak tree, Nymphenburg, Germany, October.

Solvin Zankl / Eurasian blue tit (Cyanistes caeruleus) on oak tree, Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, December.

Solvin Zankl / Acorn weevils (Curculio glandium) mating on oak tree acorn, Lower Saxonian Elbe Valley Reserve, Germany, September.

Solvin Zankl / Female Gall wasp (Cynips quercusfolii) emerging from the oak gall, Germany. October.

Solvin Zankl / English oak tree (Quercus robur) with hole in trunk, in autumn colours. Kellerwald, Hesse, Germany, November.

Solvin Zankl / English oak tree (Quercus robur) acorns developing, Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, June.

Solvin Zankl / Long eared owl (Asio otus) in flight, taking off from oak tree snag. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Long eared owl (Asio otus) perched on oak tree snag at night. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Oak processionary moths (Thaumetopoea processionea) caterpillars feeding on oak tree leaf, Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Leaf miner moth larvae (Stigmella sp) mine on oak tree leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, September.

Solvin Zankl / Greater spotted woodpecker (Dendrocopos major) at nest hole in oak tree. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Stag beetles (Lucanus cervus) pair mating on oak tree tree, Elbe, Germany, June.

Solvin Zankl / Lichens (Usnea filipendula, Evernia prunasti, Bryoria fuscescens, Hypogymnia physodes and Parmelia sulcata) on English oak tree (Quercus robur) near Norra Kvill National Park, Smaland, Sweden, August.

Solvin Zankl / English oak tree (Quercus robur) male flowers (catkins) producing pollen. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Gall wasps (Biorhiza pallida) mating as they emerge from the oak tree gall. Elbe, Germany, June.

Solvin Zankl / English oak tree (Quercus robur) male flowers (catkins) producing pollen. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / The Sprawler moth caterpillar (Asteroscopus sphinx) portrait on oak tree leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, June.

Solvin Zankl / Lauxaniid fly (Meiosimyza platycephala) on oak tree leaf Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, June.

Solvin Zankl / Blue tit (Parus caeruleus) flying from nest hole in oak tree tree, Elbtalaue, Lower Saxony, Germany. June.

Solvin Zankl / Gall wasp (Biorhiza pallida) on oak leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, June.

Solvin Zankl / Oak slug sawfly larva (Caliroa annulipes) on oak leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, August.

Solvin Zankl / English oak tree (Quercus robur) Nauroth, Germany, September.

Solvin Zankl / The Rumskulla oak tree, an English oak tree (Quercus robur) near Norra Kvill National Park, Smaland, Sweden. It is the oldest oak tree in Sweden and one of the largest trees in Scandinavia, with a cir...

Solvin Zankl / Stag beetle (Lucanus cervus) male flying around oak tree in search of a female. Elbtalaue, Lower Saxony, Germany. June.

Solvin Zankl / Longhorn beetle (Rhagium sycophanta) profile. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, May.

Solvin Zankl / Boy looking up at English oak tree (Quercus robur) 'Majesty' Fredville Park, Nonington, Kent, England, UK. July 2013. Estimated to be 600 to 1000 years old, with circumference of 12.29 m.

Solvin Zankl / Cockchafer beetle (Melolontha melolontha) in flight near oak tree. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, June.

Solvin Zankl / Longhorn beetle (Rhagium sycophanta) feeding on oak tree wood just below bark, Tunhem, Sweden, August.

Solvin Zankl / Ant (Lasius sp) gathering honeydew secreted by aphids on oak tree. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, June.

Solvin Zankl / Oak processionary (Thaumetopoea processionea) moth caterpillars, on oak tree branch. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / English oak tree (Quercus robur) buds. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany

Solvin Zankl / Stag beetle (Lucanus cervus) males fighting on oak tree branch, Elbe, Germany, June. Highly commended in the GDT European Wildlife Photographer of the Year 2018.

Solvin Zankl / Green shield bug (Palomena prasina) pair mating, silhouetted against leaf. Elbtalaue, Lower Saxony, Germany. June.

Solvin Zankl / Leaf mines of Moth (Tischeria ekebladella) in oak tree leaf. Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, September.

Solvin Zankl / English oak tree (Quercus robur) female flowers, Niedersechsische Elbtalaue Biosphere Reserve, Elbe Valley, Lower Saxony, Germany, May.

Solvin Zankl / Oak Leaf Roller Beetle (Attelabus nitens) rolling leaf, Gohrde, Germany, May. (sequence 1/7)

Solvin Zankl / Oak Leaf Roller Beetle (Attelabus nitens) rolling leaf, Gohrde, Germany, May. (sequence 4/7)

Solvin Zankl / Female Acorn weevil (Curculio glandium) Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, June.

Solvin Zankl / Female Acorn weevil (Curculio glandium) boring into acorn prior to egg laying, Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, August.

Solvin Zankl / Acorn weevil (Curculio glandium) larva in acorn, Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, August.

Konrad Wothe / Wasserschildkröten sonnen sich am Sandoval Lake, Podocnemis unifilis; Tambopata Reservat, Peru, Südamerika / Amazon River Turtles; Podocnemis unifilis; Sandoval Lake, Tambopata National Reserve, Peru,...

Solvin Zankl / Subadult Eurasian red squirrel (Sciurus vulgaris) head portrait, feeding with paws, Germany

Konrad Wothe / Elderly women fishing from boat on river, in rainforest. Sabah, Borneo, Malaysia.