Michael D. Kern / Venezuelan Sun Tiger Tarantula / Devil tree spider (Psalmopoeus irminia), captive from Venezuela

Laurie Campbell / Silhouette of spider at sunset, Berwickshire, Scotland, August

Chris Mattison / Camel spider / Wind Scorpion / Sun Spider (Solifugae). South Africa, October 2012.

Sven Zacek / Spider (Segestriidae) web building, sillhouetted against the rising sun, Estonia

Michael & Patricia Fogden / Sun Spider (Solifugae) on sand, Namib Desert, Namibia

Konrad Wothe / Wasp Spider (Argiope bruennichi) in web with sun, Bavaria, Germany

Konrad Wothe / Wasp Spider (Argiope bruennichi) in web with sun, Bavaria, Germany

Albert Lleal / Sun Spider (Solifugae) SEM close-up view of spider attacking a crustacean

Albert Lleal / Solifugid (Paragaleodes sp) photographed under ultraviolet light showing fluoresence, native to Africa and Asia

SINCLAIR STAMMERS / Raft spider (Dolomedes fimbriatus) warming an egg sac in the sun, amongst wetland plants. Chobham common, Surrey, England

Philippe Clement / Sun / Windscorpion spider (Solifugae sp.). Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Sun / Windscorpion spider (Solifugae sp.). Organ Pipe Cactus National Monument, Arizona, USA

Tony Phelps / Camel / Sun spider {Solifugae} Little Karoo, South Africa

Tony Phelps / Camel / Sun spider {Solifugae} Little Karoo, South Africa

Piotr Naskrecki / Sun Spider (Solifugae) feeding on grasshopper, Kruger National Park, Mpumalanga, South Africa

Piotr Naskrecki / Sun Spider (Solifuga) with captured Grasshopper prey, South Africa

Piotr Naskrecki / Sun Spider (Solifuga) does not have venom glands, their large chelicerae are strong enough to kill prey at least as big as themselves, South Africa

Piotr Naskrecki / Sun Spider (Solifuga) does not have venom glands, their large chelicerae are strong enough to kill prey at least as big as themselves, South Africa

Piotr Naskrecki / Sun Spider (Solifuga) does not have venom glands, their large chelicerae are strong enough to kill prey at least as big as themselves, South Africa

Nick Gordon / Two Red faced spider monkeys (Ateles paniscus chamek) hanging by prehensile tails to catch early warming sun rays, Amazonia, Brazil

Piotr Naskrecki / Sun Spider (Solifuga) does not have venom glands, their large mouthparts, or chelicerae, are strong enough to kill prey at least as big as themselves, diurnal, Botswana

Piotr Naskrecki / Sun Spider (Solifuga) does not have venom glands, their large mouthparts, or chelicerae, are strong enough to kill prey at least as big as themselves, diurnal, Botswana

Kim Taylor / Sun spider {Solifugae sp.} portrait. Captive.

Kim Taylor / Sun / Camel spider {Solifugae sp.} eating grasshopper. Two ants investigate. East Africa.

Mark Moffett / Wind Scorpion (Eremobates constricta) being caught in a glass vial by researchers in the desert, Baja California, Mexico

Tony Heald / Camel spiders (Solifugae) mating at night. Kruger GP, South Africa

Michael & Patricia Fogden / Sun Spider (Solifugae), Namib Desert, Namibia

Mark Moffett / Wind Scorpion (Galeodidae) close-up of a baby, Iran

Mark Moffett / Wind Scorpion (Eremocosta titania) female at right devours the head of her failed suitor, Mojave Desert, California

Mark Moffett / Wind Scorpion (Galeodidae) male at left grabs and twists female prior to mating, desert, Iran

Mark Moffett / Wind Scorpion (Galeodidae) male at left lunges at a female tearing her body and damaging her legs before mating, desert, Iran

Mark Moffett / Wind Scorpion (Galeodidae) male at top approaches a female and strokes her with its pedipalps before mating, desert, Iran

Mark Moffett / Wind Scorpion (Eremorhax joshui) female on left approaches a male, Mojave Desert, California

Mark Moffett / Wind Scorpion (Eremorhax joshui) adult female feeding on a lizard it has killed, Mojave Desert, California

Mark Moffett / Wind Scorpion (Eremorhax joshui) adult female feeding on a lizard it has killed, Mojave Desert, California

Mark Moffett / Wind Scorpion (Eremorhax joshui) adult female feeding on a lizard it has killed, Mojave Desert, California

Mark Moffett / Wind Scorpion (Eremobates constricta) adult found hiding under a rock in the desert, Baja California, Mexico

Mark Moffett / Wind Scorpion (Galeodidae) adult at the edge of Ramon Crater, Arava Rift Valley, Israel

Mark Moffett / Wind Scorpion (Galeodidae) adult in the desert, Israel

Mark Moffett / Wind Scorpion (Chanbria sp) close-up of eyes, southern California

Mark Moffett / Wind Scorpion (Chanbria sp) digging a burrow in the sand, southern California

Mark Moffett / Wind Scorpion (Chanbria sp) two males fighting, southern California

Mark Moffett / Wind Scorpion (Chanbria sp) feeds on a Sand Scorpion (Paruroctonus sp), Algodones Dunes, southern California

Mark Moffett / Wind Scorpion (Chanbria sp) feeds on a Sand Scorpion (Paruroctonus sp), Algodones Dunes, southern California

Mark Moffett / Wind Scorpion (Chanbria sp) is killed by a sting from a Sand Scorpion (Paruroctonus sp), Algodones Dunes, southern California

Mark Moffett / Wind Scorpion (Galeodidae) two adults sharing food, Iran

Mark Moffett / Wind Scorpion (Galeodidae) eats a Gecko it has killed while a researcher with a flashlight looks on, Iran

Mark Moffett / Wind Scorpion (Galeodidae) runs on a treadmill under the watchful eye of biologist Kellar Autumn, Lewis and Clark College, Portland, Oregon

Mark Moffett / Wind Scorpion (Eremorhax joshui) captured by photographer Mark Moffett while researcher Warren Savary puts out lanterns to attract more specimens who rush in to feed on the insects the light attracts,...

Mark Moffett / Wind Scorpion (Eremorhax joshui) female feeding on a lizard it has killed, Mojave Desert, California