Loic Poidevin / Northern ravens (Corvus corax) interacting in snow, Leon, Spain, February.

Loic Poidevin / Eurasian bullfinch (Pyrrhula pyrrhula) male on a branch feeding on Rowan (Sorbus aucuparia) berries, Leon, Spain, February.

Loic Poidevin / Eurasian bullfinch (Pyrrhula pyrrhula) male on a branch feeding on Rowan (Sorbus aucuparia) berries, Leon, Spain, February.

Roland Seitre / Hermit / Northern bald ibis (Geroniticus eremita) breeding project of the Jerez de la Frontera Zoo, Cadiz, Spain. Keeper with juvenile birds on open land, keepers wear ibis helmets to limit human impr...

Roland Seitre / Hermit / Northern bald ibis (Geroniticus eremita) breeding project of the Jerez de la Frontera Zoo, Cadiz, Spain. Keeper with two chicks pecking his face, keepers wear ibis helmets to limit human impr...

Juan Carlos Munoz / Huge flock of Bramblings (Fringilla montifringilla) flying to roost in trees, Gorbeia Natural Park, Basque country, Spain, January 2011, unusual winter visitors pushed further south than usual by the...

Juan Carlos Munoz / Huge flock of Bramblings (Fringilla montifringilla) in flight, Gorbeia Natural Park, Basque country, Spain, January 2011, unusual winter visitors pushed further south than usual by the harsh winter co...

Juan Carlos Munoz / Stone wall dividing field from open rough land, Vega de Pas, Cordillera cantabrica, Cantabria, Northern Spain, October 2006

Juan Carlos Munoz / Chestnuts from Sweet chestnut tree {Castenea sativa} Redes NP, Asturias, Northern Spain, October 2007

Juan Carlos Munoz / Beech woodland in the autumn, deciduous atlantic forest, Taballon de Mongayu, Redes NP, Asturias, Northern Spain, October 2007

Theo Bosboom / Aerial of flysch rock layers at the edge of the ocean, as photographed on the beach of Liencres, Northern Spain. April 2018

Theo Bosboom / Aerial of flysch rock layers at the edge of the ocean, as photographed on the beach of Liencres, Northern Spain. April 2018

Loic Poidevin / Northern raven (Corvus corax) in flight, Leon, Spain, February.

Loic Poidevin / Northern raven (Corvus corax) in snow, Leon, Spain, February.

Nick Upton / Oviedo bellflower (Campanula arvatica) endemic to northern Spain, in bloom on a mountain slope, Covadonga, Picos de Europa, Asturias, Spain, August.

Nick Upton / Pyrenean trumpet gentian (Gentiana occidentalis), an endemic species of northern Spain and the Pyrenees, in bloom on a mountain slope, above the Lakes of Covadonga, Picos de Europa, Asturias, Spain, A...

Juan Carlos Munoz / Raven (Corvus corax) portrait. Spain. October 2018.

David Tipling / Common raven (Corvus corax) displaying Extremadura, Spain. December

Ashley Cooper / Woman walking above the mountain village of Sotres, Picos de Europa National Park, northern Spain. June 2005

Ashley Cooper / Mountain village of Sotres in the Picos de Europa National Park, northern Spain. June 2005

Ashley Cooper / Cares Gorge, Picos de Europa, northern Spain. June 2005

Ashley Cooper / Aquaduct in the Cares Gorge, Picos de Europa, in northern Spain. June.

Ashley Cooper / Woman walking above the mountain village of Sotres, Picos de Europa National Park, northern Spain. June 2005

Robin Chittenden / Northern raven (Corvus corax tingitanus) perched on fence, Fuerteventura, Canary Islands, Spain. February.

Loic Poidevin / Northern goshawk (Accipiter gentilis) male eating Red legged partridge (Alectoris rufa) Valencia, Spain, February

Loic Poidevin / Northern goshawk (Accipiter gentilis) male eating Red legged partridge (Alectoris rufa) Valencia, Spain, February

Loic Poidevin / Northern goshawk (Accipiter gentilis) male eating Red legged partridge (Alectoris rufa) Valencia, Spain, February

Loic Poidevin / Northern goshawk (Accipiter gentilis) male eating Red legged partridge (Alectoris rufa) Valencia, Spain, February

Loic Poidevin / Northern goshawk (Accipiter gentilis) male eating Red legged partridge (Alectoris rufa) Valencia, Spain, February

Loic Poidevin / Northern goshawk (Accipiter gentilis) male eating Red legged partridge (Alectoris rufa) Valencia, Spain, February

Loic Poidevin / Northern goshawk (Accipiter gentilis) male eating Red legged partridge (Alectoris rufa) Valencia, Spain, February

Brais Seara Fernandez/ BIA / Northern Goshawk (Accipiter gentilis) male, Castile-Leon, Spain

Andres M. Dominguez/ BIA / Northern Wheatear (Oenanthe oenanthe) male, Asturias, Spain

Mathias Schaef/ BIA / Common Raven (Corvus corax), Extremadura, Spain

David Kjaer / House martin (Delichon urbica) at nest, Spain, June.

David Kjaer / Griffon vulture (Gyps fulvus) flock on hillside with one interacting with Raven (Corvus corax) Pyrenees, Spain, April.

Andres M. Dominguez / Male Sparrowhawk (Accipiter nisus) bathing, Andalusia, Spain, June.

Andres M. Dominguez / Reynisdrangar basalt sea stacks with snow, Vik, Iceland, February 2017.

Andres M. Dominguez / Common redpoll (Acanthis flammea), Hofn, Iceland. February.

Andres M. Dominguez / Two Icelandic horses in snow, Hofn, Iceland, February.

Andres M. Dominguez / Family of Whooper swan (Cygnus cygnus), Iceland, February.

Andres M. Dominguez / Reynisdrangar basalt sea stack with rainbow, Vik, Iceland, February 2017

Andres M. Dominguez / Gyrfalcon (Falco rusticolus), Iceland. February.

Andres M. Dominguez / Sparrowhawk (Accipiter nisus) , Andalusia, Spain, August.

Loic Poidevin / Two Ravens (Corvus corax) interacting on branch, Sierra de Guadarrama, Spain, January.

Loic Poidevin / Ravens (Corvus corax) feeding on a boar carcass, Sierra de Guadarrama, Spain. January.

Loic Poidevin / Two Ravens (Corvus corax) perched on branch, Sierra de Guadarrama, Spain, January.

Loic Poidevin / Raven (Corvus corax) Sierra de Guadarrama, Spain, January

Loic Poidevin / Northern goshawk (Accipiter gentilis) viewed from behind, Spain, February.

Loic Poidevin / Northern goshawk (Accipiter gentilis) looking over shoulder, Spain, February.

Inaki Relanzon / Eagle fern (Pteridium aquilinum) frond unfurling, Montseny Natural Park, a UNESCO National Park and Biosphere Reserve, Barcelona, Catalonia, Spain, June 2016.

Francisco Marquez / Raven (Corvus corax) perched in a pine tree during a blizzard, Ordesa y Monte Perdido National Park, Spain, April.

Inaki Relanzon / Chamois (Rupicapra rupicapra) mother and kid resting, Ordesa National Park, Pyrenees, Spain.

David Tipling / Eurasian Stone culew (Burhinus oedicnemus) drinking from pool in late evening light, Belchite Spain, July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) Belchite, Spain July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) drinking, Belchite, Spain July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) bathing, Belchite Spain July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) bathing, Belchite Spain July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) drinking Belchite Spain July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) Belchite Spain July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) head portrait, Belchite Spain, July

David Tipling / Eurasian Stone curlew (Burhinus oedicnemus) in water at dusk, Belchite Spain July

Carol Walker / Grey Andalusian stallion running in arena in Northern France, Europe. March.

David Kjaer / Stone-curlew (Burhinus oedicnemus) Spain, July

David Kjaer / Stone-curlew (Burhinus oedicnemus) Spain, July

David Kjaer / Stone-curlew (Burhinus oedicnemus) Spain July

David Kjaer / Raven (Corvus corax) feeding on dead Badger, Pyrenees, Spain July

David Kjaer / Raven (Corvus corax) Spain, July

Loic Poidevin / Common starlings (Sturnus vulgaris) mass group in flight, Spain, February

Martin Gabriel / Great grey shrike (Lanius excubitor), Fuerteventura, Canary Islands, Spain, December.

Martin Gabriel / Raven (Corvus corax), portrait, Fuerteventura, Canary Islands, Spain, December.

Martin Gabriel / Great grey shrike {Lanius excubitor}, Fuerteventura, Canary Islands, Spain, December.

David Tipling / Eurasian stone curlew (Burhinus oedicnemus) next to water, Belchite, Spain, January.

David Tipling / Eurasian stone curlew (Burhinus oedicnemus) Belchite, Spain, January.

Andres M. Dominguez / Eagle owl (Bubo bubo) male perched. Cadiz, Spain. December

Andres M. Dominguez / Wheatear (Oenanthe oenanthe) male on stone. Sierra de Grazalema Natural Park, southern Spain, May.

Andres M. Dominguez / European white birch (Betula pubescens) woodland in winter, Spain, March 2016.

Stephen Dalton / House martins (Delichon urbicum) at communal nesting site under house balcony, Extremadura, Spain, April

Brais Seara Fernandez/ BIA / Common Raven (Corvus corax), Castile-Leon, Spain

Andres M. Dominguez / Common treecreeper (Certhia familiaris) on tree trunk, Ordesa y Monte Perdido Natural, , Huesca, Spain

Andres M. Dominguez / Eurasian oystercatcher (Haematopus ostralegus) group on Valdelagrana Beach with city in the background, Puerto de Santa Marja, Cadiz, southern Spain, August.

Robert Thompson / Burnt tip orchid (Neotinea ustulata) in flower, Puerto de San Gloria, Potes, Picos de Europa, northern Spain, May.

Loic Poidevin / Northern wheatear (Oenanthe oenanthe) profile, Estrmadure, Spain, April.

Oscar Diez / Northern Goshawk (Accipiter gentilis) female with rabbit prey, Madrid, Spain

Jussi Murtosaari / Queen of Spain fritillary butterfly (Issoria lathonia) newly emerged male, Parainen / Lansi-Turunmaa, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. July

Jussi Murtosaari / Queen of Spain fritillary butterfly (Issoria lathonia) newly emerged female, Parainen / Lansi-Turunmaa, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. July

Oscar Diez / Waldrapp (Geronticus eremita) on nest, Andalusia, Spain

Sam Hobson / Common raven (Corvus corax), known locally as 'Geronimo'. Fuerteventura, Canary Islands, Spain. April.

Sam Hobson / Common raven (Corvus corax), known locally as 'Geronimo'. Fuerteventura, Canary Islands, Spain. April.

Philippe Clement / Barbary macaque (Macaca sylvanus) Cabarceno Park, Cantabria, Spain. Captive, occurs in Northern Africa and Gibraltar.

Philippe Clement / Barbary macaque (Macaca sylvanus) grooming deer, Cabarceno Park, Cantabria, Spain. Captive, occurs in Northern Africa and Gibraltar.

Philippe Clement / African spurred tortoise (Geochelone sulcata) Cabarceno Park, Cantabria, Spain. Captive, occurs in the Sahara desert, northern Africa.

Philippe Clement / Eurasian brown bear (Ursus arctos arctos) mother with cub, Cabarceno Park, Cantabria, Spain, May. Captive, occurs in Northern Europe and Russia.

Philippe Clement / Eurasian brown bear (Ursus arctos arctos) mother with cub, Cabarceno Park, Cantabria, Spain, May. Captive, occurs in Northern Europe and Russia.

Philippe Clement / Eurasian brown bear (Ursus arctos arctos) mother with cub, Cabarceno Park, Cantabria, Spain, May. Captive, occurs in Northern Europe and Russia.