Gavin Hellier / Cobbled street lined with colourful houses known as Kujundziluk, one of the oldest streets in Mostar leading to the Old Bridge, Old Town, Mostar, Herzegovina, Bosnia and Herzegovina, Balkans, 2007. No...

Ernie Janes / House sparrows (Passer domesticus) perched on building, Morocco, March

Ernie Janes / Storm clouds building up off coasts of Norfolk, Weybourne Cliffs, Norfolk, UK, November

Pete Oxford / Huaorani Indian house. The houses are made by constructing a frame from cut logs and covering it with palm leaves. Gabaro Community, Yasuni National Park, Ecuador, June 2007.

Juergen Freund / Bungalows of Misool Eco Resort as night falls. Misool, Raja Ampat, West Papua, Indonesia, January 2010

Eric Dragesco / A yurt of a Kyrgyz shepherd family on the steppe. Naryn National Park, Kyrgyzstan, Central Asia, November 2009.

Laurent Geslin / Honey bees (Apis mellifera) flying through the city. Paris, France

Laurent Geslin / House mouse (Mus musculus) walking down sloping beam in light from a window. Switzerland. Captive, May. Property released

Laurent Geslin / Common sparrows (Passer domesticus) two females and a male flying in urban park, Paris. France, November.

Wild Wonders of Europe / della Ferrera / Nesting colony of House martins (Delichion urbicum) in a building, Muilovcica village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Wild Wonders of Europe / della Ferrera / Nesting colony of House martins (Delichion urbicum) in a building, Muilovcica village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Mark Raycroft / Cairn Terrier (Canis familiaris) on deck

Andy Sands / House Mouse {Mus domesticus / musculus} sitting-up outside farm building, Captive, UK.

Michael Durham / Brown Rat (Rattus norvegicus) raiding urban garbage, common pest species native to Europe, introduced worldwide

Norbert Wu / Larvacean (Oikopleura labradorensis) house, primitive animal spins mucus web, Arctic

Jim Brandenburg / Farm house and tree-lined road in winter, Minnesota

Juergen Freund / Rest house for fishermen on beach, Pamilacan Is, Philippines

Ross Hoddinott / Popradske Pleso, looking toward mountain range, in late evening light, with reflections and mist. Tatra Mountains, Slovakia June 2012

Terry Whittaker / 2020VISION / Red fox (Vulpes vulpes) eating pet food left out for it in suburban garden at twilight, Kent, UK, August, taken with camera trap. Did you know? Foxes first colonised British cities in the 1930-40s....

Scott Leslie / Cape Forchu Lightstation, Yarmouth, Nova Scotia, Gulf of Maine, Canada

Scott Leslie / Cape Forchu Lightstation, Yarmouth, Nova Scotia, Gulf of Maine, Canada

Sebastian Kennerknecht / Cassin's Auklet (Ptychoramphus aleuticus) researchers, Jennifer Aragon, Michael Johns, and Ilana Nimz, weighing chicks taken from artifical nesting burrows near research station, South Farallon Island...

Sebastian Kennerknecht / Cassin's Auklet (Ptychoramphus aleuticus) researcher, Ilana Nimz, weighing chick taken from artifical nesting burrow near research station, South Farallon Islands, Farallon Islands, Farallon National...

Sebastian Kennerknecht / Western Gull (Larus occidentalis) nesting colony near research station, South Farallon Islands, Farallon Islands, Farallon National Wildlife Refuge, California

Scott Leslie / East Quoddy Lighthouse at dusk, Campobello Island, Bay of Fundy, Canada

Robin Chittenden / House Martins (Delichon urbicum) collecting mud with which to make nests, Northumberland UK June

Robin Chittenden / House Martin (Delichon urbicum) picking up mud for nesting material, Northumberland UK June

Alan Williams / House sparrow (Passer domesticus) female with feather for nest building, Wirral Merseyside, UK June

Alan Williams / House sparrow (Passer domesticus) female with feather for nest building, Wirral Merseyside, UK June

Jim Brandenburg / Rock house and grass, France

Tom Vezo / House on Fire Ruin, Mule Canyon, Bears Ears National Monument, Utah

David Woodfall / Cultivating tomatoes in plastic 'house', in shadow of tallest building in Wales, on former football pitch - Vetch field - now a community allotment, Swansea West Glamorgan, Wales, UK, June 2006. Edito...

David Woodfall / Cultivating tomatoes in plastic 'house' in shadow of tallest building in Wales on former football pitch - Vetch field - now a community allotment, Swansea West Glamorgan, Wales, UK, June 2006. Editor...

Konrad Wothe / House Martin (Delichon urbicum) collecting clay for nest building, May

Pete Oxford / Maxus Road, originally an oil road, and building showing colonization, Yasuni National Park, Amazon, Ecuador

Pete Oxford / Maxus Road, originally an oil road and building showing colonization, Yasuni National Park, Amazon, Ecuador

Pete Oxford / Clear cut near Maxus Road, originally an oil road, now showing colonization, Yasuni National Park, Amazon, Ecuador

David Woodfall / Destruction of countryside in green belt close to market town, for building of houses in flood plain, future Glasdir estate, Ruthin, Vale of Clwyd, Denbighshire, Wales, UK. This is a highlighted area...

David Woodfall / Destruction of countryside in green belt close to market town, for building of houses in flood plain, future Glasdir estate, Ruthin, Vale of Clwyd, Denbighshire, Wales, UK. This is a highlighted area...

David Woodfall / Oak tree felled in order to make way for building of houses in flood plain, future Glasdir estate, Ruthin, Vale of Clwyd, Denbighshire, Wales, UK. This is a highlighted areas in UK at risk of floodin...

David Woodfall / Destruction of countryside in green belt close to market town, for building of houses in flood plain, future Glasdir estate, Ruthin, Vale of Clwyd, Denbighshire, Wales, UK. This is a highlighted area...

David Woodfall / Destruction of countryside in green belt close to market town, for building of houses in flood plain, future Glasdir estate, Ruthin, Vale of Clwyd, Denbighshire, Wales, UK. This is a highlighted area...

David Woodfall / Destruction of countryside in green belt close to market town, for building of houses in flood plain, Vale of Clwyd, Denbighshire, Wales, UK. This is a highlighted areas in UK at risk of flooding and...

Richard Du Toit / Green suburbs, Sandton, Gauteng, South Africa

Mark Raycroft / Australian Shepherd (Canis familiaris) males on porch

Konrad Wothe / Domestic Cat (Felis catus) catching mouse in garden, Bavaria, Germany

Christian Ziegler / Housing development, Bastimentos National Marine Park, Bocas del Toro, Panama

Ingo Arndt / Pueblo or Anasazi Indian cliff dwellings built around 1060 AD, White House Ruins, Canyon De Chelly National Monument, Arizona

Ingo Arndt / Pueblo or Anasazi Indian cliff dwellings built around 1060 AD, White House Ruins, Canyon De Chelly National Monument, Arizona

Konrad Wothe / Common House Martin (Delichon urbicum) collecting clay for nest building, Europe

Konrad Wothe / Common House Martin (Delichon urbicum) collecting clay for nest building, Europe

Pete Oxford / Hippopotamus (Hippopotamus amphibius) named Jessica was orphaned as a baby, on porch with dog and person, Lowveld, South Africa

Pete Oxford / Hippopotamus (Hippopotamus amphibius) named Jessica was orphaned as a baby, calling on porch, Lowveld, South Africa

Charlie Summers / Gentoo Penguin (Pygoscelis papua) re-arranging rocks at its nest, Petermann Island, Antarctica, November

Alan Williams / House Martin (Delichon urbicum) on ground gathering mud for nest building, North Wales, UK, May 2010

Alan Williams / House Martin (Delichon urbicum) on ground gathering mud for nest building, North Wales, UK, May 2010

Marie Read / House Wren (Troglodytes aedon) nest building, at its nest hole in an Aspen (Populus tremuloides) trunk, Mono Lake Basin, California, USA

Pete Oxford / City in Puerto Ayora with houses and shacks, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Palm leaves used for thatch by Macushi people, Yupukari Village, Rupununi, Guyana

Aflo / N-20601 Extensive agricultural landscape with fields of crops and farm building, Hokkaido, Japan.

Aflo / N-20403 Extensive agricultural landscape with fields of crops and distant building, Hokkaido, Japan.

Aflo / N-12303 Brandlehow Bay, Derwent Water, Lake District NP, Cumbria, UK.

Aflo / ic-04208 Puppy sitting on doorstep of house.

Jasper Doest / House Mouse (Mus musculus) in brick wall, Zuid-Holland, Netherlands

Jasper Doest / House Mouse (Mus musculus) in brick wall, Zuid-Holland, Netherlands

Colin Monteath / Abandoned farm house, central Otago, New Zealand

Stephen Dalton / Hedgehog (Erinaceus europaeus) on garden lawn at night, UK

Matthias Breiter / Tlingit totem pole and longhouse at Saxman Native Village, Ketchikan, Alaska

Wild Wonders of Europe / della Ferrera / Nesting colony of House martins (Delichion urbicum) in a building, Mužilovcica village, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Richard Du Toit / Low cost housing, Gauteng, South Africa

James Christensen / Moreau's Tropical House Gecko (Hemidactylus mabouia) pair mating on ceiling, Colon, Panama

Andy Sands / House martin (Delichon urbicum) collecting mud for nest building, Hertfordshire, England, UK.

Piotr Naskrecki / Moreau's Tropical House Gecko (Hemidactylus mabouia) eating moth, Mkambati Nature Reserve, South Africa. Sequence 3 of 3

Piotr Naskrecki / Moreau's Tropical House Gecko (Hemidactylus mabouia) catching moth, Mkambati Nature Reserve, South Africa. Sequence 2 of 3

Piotr Naskrecki / Moreau's Tropical House Gecko (Hemidactylus mabouia) catching moth, Mkambati Nature Reserve, South Africa. Sequence 1 of 3

Bernard Castelein / Rajasthani woman looking out of building with traditional painting on mud wall of house during Diwali festival, Bada Gaire Killa village, Rajasthan India

Kerstin Hinze / House Martin (Delichon urbicum) adult building nest from mud, Bulgaria

Kerstin Hinze / House Martin (Delichon urbicum) adult building nest from mud, Bulgaria

Scott Leslie / Moose (Alces alces americana) walking across lawn, Cape Breton Highlands National Park, Nova Scotia, Canada

Scott Leslie / Moose (Alces alces americana) walking across lawn, Cape Breton Highlands National Park, Nova Scotia, Canada

Richard Du Toit / Walled townhouse complex showing dense suburban development, Pretoria, South Africa

Roger Powell / House Martin {Delichon urbicum} at nest complex on side of building, Alcantara, Spain

Dave Bevan / Common / House sparrow (Passer domesticus) male carrying feather for nest building, UK

Jean E. Roche / Camargue horses outside traditional stone house, waiting for their guardians, Camargue, France

Suzi Eszterhas / Samburu homestead from the air showing corral and homes in arid landscape, Kenya

Katherine Feng / Destroyed buildings after the May 12, 2008 earthquake and landslides, CCRCGP, Wolong, China

Katherine Feng / Destroyed buildings after the May 12, 2008 earthquake and landslides, CCRCGP, Wolong, China

Andy Reisinger / Ice encrusted Syme hut on Fatham's Peak, Mount Egmont National Park, New Zealand

Ingo Arndt / Monarch (Danaus plexippus) butterfly resting on flower in a front yard during migration, Cape May, New Jersey

Sergey Gorshkov / Brown Bear (Ursus arctos) near human encampment, Kamchatka, Russia

Christian Ziegler / Aerial of east of Panama City, people dwell in simple housings on recently logged land

Colin Monteath / Lonely farm cottage, Canna Island, Inner Hebrides, Scotland

Tim Fitzharris / Stronghold House with Sleeping Ute Mountain, Hovenweep National Monument, Utah

Philippe Clement / House martins (Delichon urbicum) collecting mud for building their nests, Extremadura, Spain

Philippe Clement / House martins (Delichon urbicum) collecting mud for building their nests, Extremadura, Spain