Andrew Parkinson / 2020VISION / An adult male Mallard (Anas platyrhynchos) comes in to land, backlit by evening sunlight, Derbyshire, England, UK, March. Did you know? In addition to the colour differences between male and female du...

Andrew Parkinson / Fulmar (Fulmarus glacialis) in flight, with view straight down a precipitous cliff face, and resting Northern Gannets (Morus bassanus) Shetland Islands, Scotland, UK, May (non-ex)

TJ Rich / Male silverback Western lowland gorilla sitting portrait {Gorilla gorilla gorilla} UK

Oriol Alamany / Conifer forest tree trunks in Fraser Valley, Mount Robson Provincial Park, Rocky Mountains, British Columbia, Canada

Charlie Summers / Leopard (Panthera pardus) climbing straight up a tree, Serengeti National Park, Tanzania

Brent Stephenson / Zino's petrel (Pterodroma madeira) in flight, flying straight at the camera. Off Madeira, North Atlantic. May. Endangered.

Piotr Naskrecki / Straight Snout Weevil (Brentidae), Muller Range, Papua New Guinea

MYN / Clay Bolt / Straight-lanced meadow katydid (Conocephalus strictus) female showing long ovipositor, Pickens County, South Carolina, USA, August. meetyourneighbours.net project

Piotr Naskrecki / Straight-snouted Weevil (Brentidae) displaying, La Selva Biological Research Station, Heredia, Costa Rica

Piotr Naskrecki / Straight-snouted Weevil (Brentidae), La Selva Biological Research Station, Heredia, Costa Rica

Piotr Naskrecki / Straight-snouted Weevil (Arrhenodes sp), La Selva Biological Research Station, Heredia, Costa Rica

Piotr Naskrecki / Straight-snouted Weevil (Arrhenodes sp), La Selva Biological Research Station, Heredia, Costa Rica

Piotr Naskrecki / Straight-snouted Weevil (Arrhenodes sp), La Selva Biological Research Station, Heredia, Costa Rica

Piotr Naskrecki / Straight-snouted Weevil (Arrhenodes sp), La Selva Biological Research Station, Heredia, Costa Rica

Andrew Parkinson / Common gull (Larus canus) adult in its winter plumage 'long calling' straight toward the photographer, Norfolk, UK, January.

Frederique Olivier / Pod of Killer whales (Orcinus orca) male and at least four females, Kista Straight, near Mawson, Antarctica. Taken on location for the BBC series, Frozen Planet.

Juergen Freund / Fresh frozen shrimps straight from the freezer compartment of a shrimp trawler, with boxed shrimps ready for pick-up or delivery. Indonesia, July 2009.

Juergen Freund / Purse seiner with thousands of watts of lights which remain on for 3 straight hours to attract fish. These vessels are very effective at targetting schools of fish that aggregate near the surface of t...

Brent Stephenson / White / Fairy Tern (Gygis alba) egg balancing on its branch nest. The egg is laid straight on to the branch. Tahanea, Tuamotus, French Polynesia, November.

Brent Stephenson / White / Fairy Tern (Gygis alba) egg balancing on its branch nest. The egg is laid straight on to the branch. Tahanea, Tuamotus, French Polynesia, November.

Matthias Breiter / Straights as seen from Deer Mountain, Ketchikan, Tongass National Forest, Alaska

Thomas Marent / Straight Line Mapwing (Cyrestis nivea) butterfly pair feeding on minerals in sand, Gunung Leuser National Park, northern Sumatra, Indonesia

Thomas Marent / Straight Line Mapwing (Cyrestis nivea) butterfly group feeding on minerals in sand, Gunung Leuser National Park, northern Sumatra, Indonesia

Thomas Marent / Straight Line Mapwing (Cyrestis nivea) butterfly feeding on minerals in sand, Gunung Leuser National Park, northern Sumatra, Indonesia

Bryan and Cherry Alexander / Competitors on the final straight of a Reindeer / Caribou (Rangifer tarandus) race at Jokkmokk winter market, Sweden.

Bryan and Cherry Alexander / Straight Line Leads in the Polar pack ice. Arctic Ocean, 1998.

Aflo / N-4305 Woodland tree trunks, Japan

Aflo / N-4401 Bamboo forest, Kanagawa, Japan.

Aflo / N-3601 through Bamboo forest, Japan.

Eric Baccega / Lord Saumarez holding the blazon of his ancestors. He is the straight descendant of Admiral James Saumarez, who was a commander of Admiral Nelson, and his family has lived on Guernsey since 1120. Chan...

Pete Oxford / Straight road connecting Port Howard to Port Stephens, Port Howard, Northern end of West Falkland, Falkland Islands

Pete Oxford / Straight road connecting Port Howard to Port Stephens, Port Howard, Northern end of West Falkland, Falkland Islands

Pete Oxford / Straight road connecting Port Howard to Port Stephens, Port Howard, Northern end of West Falkland, Falkland Islands

Robert Valentic / Swift moving striped skink {Ctenotus spaldingi} foraging amongst grasses, diurnal, Hughenden, Queensland, Australia

Steven David Miller / The Katoomba Skyway has a clear floor giving tourists a view straight down into the valleys of the Blue Mountains, New South Wales, Australia

Pete Oxford / Nazca booby (formerly Masked booby) (Sula granti) looking straight at camera, Española / Hood Island, Galapagos

Paul Hobson / Mountain Hare (Lepus timidus) on moorland looking straight at the camera, Peak District, UK

David Noton / Evening light on forest in Johnstone Straight, British Columbia, Canada

John Cancalosi / European paper wasp female (note straight antennae) USA {Polistes dominulus}.

Michael & Patricia Fogden / Straight-billed Hermit (Phaethornis bourcieri) hummingbird nest, Amazon rainforest, Peru

Claus Meyer / Straight-billed Woodcreeper (Xiphorhynchus picus) portrait, Atlantic Forest ecosystem, Brazil

Claus Meyer / Straight-billed Hermit (Phaethornis bourcieri) hummingbird portrait, Amazon ecosystem, Brazil

Claus Meyer / Straight-billed Hermit (Phaethornis bourcieri) hummingbird parent incubating eggs on nest, southern Brazil

Flip de Nooyer / Avenue of European beech trees in woodland {Fagus sylvatica} Netherlands

Steven David Miller / Eyre highway, straight road vanishing into horizon nr Balladonia Roadhouse, Nullarbor, W Australia

TJ Rich / Male silverback Western lowland gorilla sitting portrait {Gorilla gorilla gorilla} UK

TJ Rich / Male silverback Western lowland gorilla sitting portrait {Gorilla gorilla gorilla} UK

DAVID TIPLING / Avenue of Birch trees beside road in snow. Liminka, Finland

Paul D Stewart / Coloured lithograph of plesiosaur and ichthyosaur, a contemporary continental version of the wall chart by Benjamin Waterhouse Hawkins entitled 'Waterhouse Hawkins Diagrams of the Extinct Animals'. He...

Paul D Stewart / 1858 illustration of marine monsters by Benjamin Waterhouse Hawkins. Plate 23, to face page 33, of the New Edition, postumously published, of William Buckland's 'Geology and Mineralogy' - part of the...

Pete Oxford / Warthog (Phacochoerus africanus) running with tail straight up, Moremi Game Reserve, Okavango Delta, Botswana