John Chan / Anna's Hummingbird (Calypte anna) chick, sleeping in nest, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March.

John Chan / Male Anna's hummingbird (Calypte anna) cleaning its beak on a twig, Southern California, USA, January.

Ingo Arndt / Seabird colony nesting on cliff face, Lange Anna, Helgoland, Germany

Guy Edwardes / 2020VISION / Family, man, boy and girl, birdwatching in reedbeds at Westhay SWT reserve, Somerset Levels, Somerset, England, UK, June 2011 Model released

Diane McAllister / Male Anna's hummingbird (Calypte anna) hovers in mid-air looking at the camera in a backyard in Reno. Nevada, USA, August

Doug Gimesy / Sue Swain kissing rescued bush fire victim koala (Phascolarctos cinereus) named 'Sooty'. Sooty was very badly burnt during the Taree bushfires (NSW) in November 2019. His nose, hands, feet and chin we...

Doug Gimesy / Sue Swain with rescued bush fire victim koala (Phascolarctos cinereus) named 'Sooty'. Sooty was very badly burnt during the Taree bushfires (NSW) in November 2019. His nose, hands, feet and chin were...

Doug Gimesy / Sue Swain with rescued bush fire victim koala (Phascolarctos cinereus) named 'Sooty', Sooty was very badly burnt during the Taree bushfires (NSW) in November 2019. His nose, hands, feet and chin were...

Doug Gimesy / Very badly burnt front foot of a Koala (Phascolarctos cinereus) named 'Sooty' from the Taree bushfires (NSW) in November 2019, is held by koala rescuer and carer, Sue Swain. When he arrived, his nose...

Doug Gimesy / Sue Swain looks at the bush fire victim koala (Phascolarctos cinereus) named 'Sooty' who she has just applied burn cream to. 'Sooty' was very badly burnt during the Taree bushfires...

Doug Gimesy / ?Sue Swain gives a bush fire victim koala (Phascolarctos cinereus) named 'Sooty', a dietary supplement in her garage (where she keeps this koala being cared for). ??Sooty' was very badly burnt during...

Doug Gimesy / ?Sue Swain gives a bush fire victim koala (Phascolarctos cinereus) named 'Sooty', a dietary supplement in her garage. '??Sooty' was very badly burnt during the Taree bushfires (NSW) in November 2...

Pascal Kobeh / Anna's chromodoris nudibranchs (Chromodoris annae) courtship, Sulu sea, Philippines

Pascal Kobeh / Anna's chromodoris nudibranchs (Chromodoris annae) courtship, Sulu sea, Philippines

John Chan / Anna's hummingbird (Calypte anna) chick in nest, exploring nest area with its tongue, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) returning to feed its chick, regurgitating insects and nectar into its mouth, Southern California, USA, March.

John Chan / Anna's hummingbird (Calypte anna) chick stretching its wings in nest, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) returning to feed its chick, regurgitating insects and nectar into its mouth, Southern California, USA, March.

John Chan / Anna's hummingbird (Calypte anna) chick in nest stretching its tongue, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) returning to nest to incubate eggs after feeding, Southern California, USA, March.

John Chan / Male Anna's hummingbird (Calypte anna) taking off and landing, defending its territory from intruders, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) flying back and forth from its perch, hunting gnats swarming nearby, Southern California, USA, January.

John Chan / Male Anna's hummingbird (Calypte anna) stretching and taking flight, Southern California, USA, January.

John Chan / Male Anna's hummingbird (Calypte anna) taking flight, Southern California, USA, January.

John Chan / Male Anna's hummingbird (Calypte anna) stretching, ruffling feathers and taking flight, Southern California, USA, January.

John Chan / Male Anna's hummingbird (Calypte anna) flying back and forth from its perch, hunting gnats swarming nearby, Southern California, USA, January.

Derek Galon / Anna's hummingbird (Calypte anna) in a garden in Victoria, British Columbia, Canada. June.

Piotr Naskrecki / Anna's Hummingbird (Calypte anna) male flying, Los Angeles, California

Piotr Naskrecki / Anna's Hummingbird (Calypte anna) male flying, Los Angeles, California

Piotr Naskrecki / Anna's Hummingbird (Calypte anna) male flying, Los Angeles, California

Werner Bollmann / Patterns in rock at the edge of a rock pool, St. Anna Archipelago, Sweden, August 2014.

Werner Bollmann / Common tern (Sterna hirundo) flying looking down to the ground, St. Anna Archipelago, Sweden, May.

John Chan / Male Anna's hummingbird (Calypte anna) flares gorget showing iridescence, takes off from perch, Bolsa Chica Ecological Reserve, California, USA, January.

John Chan / Male Anna's hummingbird (Calypte anna) showing iridescence, takes off from perch, Bolsa Chica Ecological Reserve, California, USA, January.

John Chan / Female Allen's hummingbird (Calypte anna) taking off from perch, Bolsa Chica Ecological Reserve, California, USA, February.

Oliver Hellowell / Photographer Oliver Hellowell with mother Wendy Hellowell and sister Anna Hellowell, England, UK. March 2014.

Benjamin Olson / Anna's Hummingbird (Calypte anna) male, San Diego, California

Tim Zurowski/ BIA / Anna's Hummingbird (Calypte anna), British Columbia, Canada

Julian Hume / Ula-ai-hawane (Ciridops anna) pair (female above, male below) of (Extinct 1892). Feeding in the crown of a Pritchardia palm with Mamo (Drepanis pacifica) (Extinct 1898)

Nick Upton / Anna Carey fishing under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at night, Somerset, UK, March 201...

Nick Upton / Anna Carey fishing under license, casting a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at dusk, UK, March 2016

Sebastian Kennerknecht / Mountain Lion (Puma concolor) biologist, Anna Nisi, using satellite data to determine location of den in Coast Redwood (Sequoia sempervirens) forest, Santa Cruz Puma Project, Henry Cowell Redwoods Sta...

Sebastian Kennerknecht / Mountain Lion (Puma concolor) biologists, Anna Nisi, Justine Alyssa Smith, and Paul Houghtaling, collaring five week old male cub, Santa Cruz Puma Project, Henry Cowell Redwoods State Park, Santa Cruz...

Sebastian Kennerknecht / Mountain Lion (Puma concolor) biologists, Paul Houghtaling and Anna Nisi, looking for kittens in den, Santa Cruz Puma Project, Henry Cowell Redwoods State Park, Santa Cruz Mountains, California

Pascal Kobeh / Anna's nudibranchs (Chromodoris annae) two looking about to mate, Sulu Sea, Philippines

Nick Upton / Anna Carey fishing under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at dusk, Somerset, UK, March.

Nick Upton / Anna Carey fishing under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at night, Somerset, UK, March.

Nick Upton / Anna Carey fishing under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at night, Somerset, UK, March.

Nick Upton / Anna Carey fishing under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at dusk, with several fishermen in...

Nick Upton / Anna Carey pouring her catch from a collecting bucket into a tray after fishing under license for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at...

Nick Upton / Anna Carey approaching the River Parrett to fish under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide at dusk, Somerset, UK, M...

Nick Upton / Anna Carey fishing under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at night, pouring her catch into a...

Nick Upton / Anna Carey fishing under license with a legally sized dip net for young European eel (Anguilla anguilla) elvers, or glass eels, on a rising tide on the River Parrett at dusk, pouring her catch into a...

Gerrit Vyn / Anna's hummingbird (Calypte anna) male, King County, Washington, USA. May.

Tim Zurowski / Anna's Hummingbird (Calypte anna) male, British Columbia, Canada

Robert Thompson / Landscape of Vallee de Sant Anna, Maritime Alps, Italy, July 2014.

Robert Thompson / Landscape of Vallee de Sant Anna, Maritime Alps, Italy, July 2014.

Floris van Breugel / Anna's Hummingbird (Calypte anna) with tail feathers outstretched and wings up at sunrise in Mount Diablo State Park, California, USA. February.

Floris van Breugel / Two Anna's Hummingbirds (Calypte anna) fighting, Mount Diablo State Park, California, USA. December.

Glenn Bartley / Anna's Hummingbird (Calypte anna) male, British Columbia, Canada

Alan Murphy / Anna's Hummingbird (Calypte anna) male visiting a flower, British Columbia, Canada

Roland Seitre / Anna Baouma from A.S.P.O. teaching children about conservation of New Caledonia. Ouvea, Loyalty Islands Province, New Caledonia, August 2012.

Roland Seitre / Anna Baouma from A.S.P.O. teaching children about conservation of New Caledonia, August 2012. Ouvea, Loyalty Islands Province, New Caledonia.

Roland Seitre / Anna Baouma from ASPO trapping Polynesian rat (Rattus exulans) around wharf as part of invasive species management, Lekiny, Ouvea, Loyalty Islands Province, New Caledonia, August 2012.

Juergen Freund / Red sand dunes off the Oodnadata Track part of the Anna Creek cattle station, South Australia.

Juergen Freund / William Creek's Memorial Park with remains of Black Arrow rocket, successfully launched from the Woomera Rocket Range in October 1971. The rocket engine was recovered from the immense Anna Creek Stati...

Juergen Freund / Aerial of Neales River that brings water to Lake Eyre when it floods, Anna Creek Station property. South Australia, June 2011

Juergen Freund / Aerial of salt encrusted shores of Lake Eyre, desert part of the Anna Creek station. South Australia, June 2011

Juergen Freund / Aerial of Umbum Creek leading to Lake Eyre. Desert, part of the Anna Creek property, South Australia, June 2011

Juergen Freund / Aerial view of creek leading to Lake Eyre. Desert part of the Anna Creek property, South Australia, June 2011

Juan Manuel Borrero / Santa Anna reservoir, Noguera Ribagorzana, Lleida Province, Spain, January

Floris van Breugel / Anna's Hummingbird (Calypte anna) stretching, Mount Diablo State Park, California, USA, March

Tom Vezo / Anna's Hummingbird (Calypte anna) feeding on flower nectar, Santa Rita Mountains, Arizona

Roland Seitre / Heinz and Anna Plenge, owners of Chaparri ecolodge, Chaparri reserve, Chiclayo, Lambayeque, Peru, 2010.

Guy Edwardes / 2020VISION / Family, man, girl and boy, birdwatching from hide at Westhay SWT reserve, Somerset Levels, Somerset, England, UK, June 2011 Model released

Guy Edwardes / 2020VISION / Girl and boy birdwatching from hide at Westhay SWT reserve, Somerset Levels, Somerset, England, UK, June 2011. Model released

Guy Edwardes / 2020VISION / Family, man, boy and girl, birdwatching in reedbeds at Westhay SWT reserve, Somerset Levels, Somerset, England, UK, June 2011 Model released

Diane McAllister / Anna's hummingbird (Calypte anna) chicks about to fledge, in their nest in juniper tree in southwest Reno. Nevada, USA, July

Uri Golman / Two ladies looking through their window. (Mayor Asi Chemnitz and her secretary Anna of Nuuk Commune) This is the second largest Commune of the world. Ittoqqortoormiit. Scoresbysund, North East Greenl...

David Tipling / Anna's hummingbird (Calypte anna) perched on flower head, San Diego, California, USA, April

Mary McDonald / Anna's hummingbird {Calypte anna} in flight, southern Arizona, USA.

Mary McDonald / Anna's hummingbird {Calypte anna} in flight, southern Arizona, USA.

Wild Wonders of Europe / Arndt / Researcher Dr. Anna Pipia radio tracking Mouflon (Ovis musimon) for Wild Wonders of Europe project, Gennargentu National Park, Sardinia, Italy, November 2008

Wild Wonders of Europe / Arndt / Researcher Dr. Anna Pipia radio tracking Mouflon (Ovis musimon) for Wild Wonders of Europe project, Gennargentu National Park, Sardinia, Italy, November 2008

Shattil & Rozinski / Close up of irridescent gorget feathers of Anna's hummingbird {Calypte anna} USA

Konrad Wothe / Anna's Hummingbird (Calypte anna) male getting nectar from flower stalk, Arizona

Rolf Nussbaumer / Anna's Hummingbird {Calypte anna} female in flight feeding on flower, Tuscon, Arizona, USA

Rolf Nussbaumer / Anna's Hummingbird {Calypte anna} male in flight feeding on Yellow Trumpet Flower (Tecoma stans) Tuscon, Arizona, USA

Rolf Nussbaumer / Female Anna's Hummingbird (Calypte anna) feeding on Sage (Salvia sp.) Miller Canyon, Arizona, USA. August 2004

Rolf Nussbaumer / Female Anna's Hummingbird (Calypte anna) feeding on Mexican Honeysuckle (Justicia spicigera) Miller Canyon, Arizona, USA. August 2004

Shattil & Rozinski / Anna's hummingbird {Calypte anna} female on nest made of thread and other materials, Arizona, USA

Shattil & Rozinski / Anna's hummingbird {Calypte anna} eggs in nest with Domestic chicken egg for size comparison, USA

Keith Scholey / Black rhino "Samia" with Anna Merz, during filming for Great Rift series 1990, Lewa Downs, Kenya