Dave Bevan / Slow motion clip of a Tawny owl (Strix aluco) leaving nest site in hollow tree, Carmarthenshire, Wales, UK, April.

Alex Hyde / Close-up of Owl Butterfly (Caligo memnon) head showing compound eyes and proboscis. Captive, originating from Central America.

Michel Poinsignon / Two tawny owl (Strix aluco) chicks emerging from nest in tree, Luxembourg. May.

Sven Zacek / Tawny owl (Strix aluco) peering out of its nest hole in tree, Southern Estonia, February.

John Waters / Tawny Owl (Strix aluco) adult female hiding behind tree trunk, trained bird, Somerset, UK, January

Dale Sutton / 2020VISION / Tawny owl (Strix aluco) flying with Dormouse prey (Muscardinus avellanairus) to nest, Sussex, UK, April

Andy Rouse / Tawny Owl (Strix aluco) perched in evening light. Controlled conditions. UK, Europe, May.

Andy Rouse / Tawny owl (Strix aluco) in woodland, UK, controlled conditions, Captive

David Woodfall / Tawny owl (Strix aluco) roosting in hotel chimney. Romania, October 2010

Jane Burton / Tawny Owl chick (Strix aluco) stretching its wings.

TJ Rich / Tawny Owl juvenile portrait on tree stump {Strix aluco} Wiltshire, UK. Captive.

Robin Chittenden / Tawny owl (Strix aluco), three fledglings perched on branch. Norwich, Norfolk, England, UK. April.

Robin Chittenden / Tawny owl (Strix aluco), two fledglings perched in tree. Norwich, Norfolk, England, UK. April.

Robin Chittenden / Tawny owl (Strix aluco) perched in tree. Norwich, England, UK. April.

Edwin Giesbers / Bird ringer Henk-Jan Koning taking Tawny owl (Strix aluco) chick out of nest before ringing. Part of 60 year long-term study led by his father Fred to monitor raptor nests in a 3,400 hectare area of c...

Edwin Giesbers / Father and son, Fred and Henk-Jan Koning blocking hole of Tawny owl (Strix aluco) nest box before ringing and weighing birds. Part of 60 year long-term study to monitor raptor nests in a 3,400 hectare...

Edwin Giesbers / Tawny owl (Strix aluco), young chick in hand during nest box check. Part of 60 year long-term study by Fred and Henk-Jan Koning to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near A...

Edwin Giesbers / Tawny owl (Stix aluco) held during bird ringing session. Part of a 60 year long-term study to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amsterdam, The Netherlands. February 2...

Edwin Giesbers / Bird ringer Fred Koning holding Tawny owl (Strix aluco) during ringing session. Part of 60 year long-term study to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amsterdam, The Ne...

Edwin Giesbers / Tawny owl (Stix aluco) lying on ground, bird ringer fitting ring. Part of a 60 year long-term study led by Fred Koning to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amsterdam,...

Edwin Giesbers / Father and son, Fred and Henk-Jan Koning measuring Tawny owl (Stix aluco) wing during ringing session. Part of a 60 year long-term study to monitor raptor nests in a 3,400 hectare area of coastal dune...

Edwin Giesbers / Tawny owl (Stix aluco) behind tree trunk, portrait. Near Amsterdam, The Netherlands. February.

Edwin Giesbers / Bird ringer Henk-Jan Koning extracting Tawny owl (Stix aluco) from nest in tree cavity before ringing it. Part of a 60 year long-term study led by Fred Koning to monitor raptor nests in a 3,400 hectar...

Edwin Giesbers / Tawny owl (Strix aluco) peering out of nest hole, portrait. The Netherlands. December.

Edwin Giesbers / Tawny owl (Strix aluco) looking out of nest hole in tree trunk. The Netherlands. December.

Edwin Giesbers / Tawny owl (Strix aluco) pair resting in nest hole, in tree with autumn leaves. The Netherlands. December.

Edwin Giesbers / Tawny owl (Strix aluco) pair resting in nest in tree cavity. The Netherlands. December.

Edwin Giesbers / Tawny owl (Strix aluco) resting in nest hole. The Netherlands. December.

Edwin Giesbers / Tawny owl (Strix aluco) resting in nest hole. The Netherlands. December.

Edwin Giesbers / Tawny owl (Strix aluco) resting in nest hole. The Netherlands. December.

Edwin Giesbers / Tawny owl (Strix aluco) pair sleeping in nest hole. The Netherlands. December.

Edwin Giesbers / Bird ringer and researcher Fred Koning measuring and ringing four Tawny owl (Strix aluco) chicks. Part of a 60 year long-term study to monitor raptors and their nests in a 3,400 hectare area of coasta...

Edwin Giesbers / Tawny owl (Stix aluco), three chicks in tree stump during ringing session in woodland. Part of a 60 year long-term study led by Fred Koning to monitor raptors and their nests in a 3,400 hectare area o...

Edwin Giesbers / Tawny owl (Stix aluco) lying on ground whilst bird ring is fitted by bird ringer. Part of a 60 year long-term study led by Fred Koning to monitor raptor nests in a 3,400 hectare area of coastal dunes....

Eric Medard / Tawny owl (Strix aluco) in dawn twilight, Mayenne, France, March.

Klein & Hubert / Tawny owl (Strix aluco) in forest on old tree with tinder fungus France. Controlled conditions

Klein & Hubert / Tawny owl (Strix aluco) on spruce branch in winter, France Controlled conditions

Dave Bevan / Slow motion clip of a Tawny owl (Strix aluco) leaving nest hole in an Alder tree (Alnus glutinosa), Carmarthenshire, Wales, UK, April.

Andy Rouse / Tawny owl (Strix aluco) feeding, reflected in a pond, UK, July.

Andy Rouse / Tawny owl (Strix aluco) looking around, reflected in a pond, showing articultion of its neck, UK, July.

Andy Rouse / Tawny owl (Strix aluco) sitting, reflected in pool. UK. June.

David Tipling / Tawny owl (Strix aluco) hunting at night, North Norfolk, England, UK. February.

Bruno D'Amicis / Tawny owl (Strix aluco) female sleeping in afternoon light on old-growth Beech (Fagus sylvatica) forest tree, UNESCO World Heritage Site. Abruzzo, Lazio and Molise National Park, Italy. June 2013

Bruno D'Amicis / Tawny owl (Strix aluco) chick waiting for food on old-growth Beech (Fagus sylvatica) forest tree. UNESCO World Heritage Site. Abruzzo, Lazio and Molise National Park, Italy. June 2013

Bruno D'Amicis / Tawny owl (Strix aluco) photographed under moonlight on old-growth Beech (Fagus sylvatica) forest tree, UNESCO World Heritage Site. Abruzzo, Lazio and Molise National Park, Italy. October 2013

Pal Hermansen / Tawny owl (Strix aluco) sleeping on windowsill having fallen down chimney. Norway. April 2018.

Pal Hermansen / Tawny owl (Strix aluco), portrait in daylight. Akershus, Norway. April.

Sven Zacek / Tawny owl (Strix aluco) roadkill. Tartumaa, Southern Estonia. November 2016.