Andres M. Dominguez / Crab spider (Thomisus onustus) on white flowerhead, Sierra de Grazalema Natural Park, southern Spain, May.

Ripan Biswas / Portrait of an ant-mimicking crab spider. (Amyciaea sp) raising its legs to warn the photographer. Buxa tiger reserve, India.

Michael Hutchinson / Goldenrod crab spider (Misumena vatia) yellow female on Honesty flower, Bristol, UK, April

Emanuele Biggi / Crab spider (Xysticus sp.) on balcony, Genova, Italy, May.

Michael Hutchinson / Flower crab spider (Misumena vatia) yellow female on Honesty flowers with house and garden visible, Bristol, UK, April

Andy Sands / Crab spider (Misumena vatia) sitting on a garden flower, Hertfordshire, England, UK, April - Focus Stacked

Phil Savoie / Blue tit (Cyanistes caeruleus) bringing Crab spider (Misumena vatia) prey to nest, Monmouthshire Wales, UK, May.

Alex Hyde / Goldenrod crab spider (Misumena vatia) camouflaged on yellow flower. Nordtirol, Austrian Alps, July.

Paul Bertner / Crab Spider (Thomisidae) with Ant (Tetraponera sp) prey, Udzungwa Mountains National Park, Tanzania

Peter Schwarz/ BIA / Yellow Crab Spider (Thomisus onustus) camouflaged on flower, Dalmatia, Croatia

Michael Quinton / Crab Spider (Diaea dorsata) camouflaged on yellow flower, Alaska

Michael Quinton / Crab Spider (Thomisidae) camouflaged on flower, Alaska

Mark Moffett / Crab Spider (Thomisidae) on Creosote bush (Larrea tridentata) practices cannibalism

Bernard Castelein / Ground crab spider (Xysticus sp.) on egg sac, Klein Schietveld Nature Reserve, Brasschaat, Belgium. August.

Bernard Castelein / Ground crab spider (Xysticus sp.) on egg sac, Klein Schietveld Nature Reserve, Brasschaat, Belgium. August.

Nick Upton / Female Goldenrod crab spider (Misumena vatia) camouflaged on Yellow flag iris (Iris pseudacorus) flower waiting for prey to land, Kenfig National Nature Reserve, Glamorgan, Wales, UK, June.

Nick Upton / Female Goldenrod crab spider (Misumena vatia) on Red clover (Trifolium pratense) flower waiting for for prey to land, Kenfig National Nature Reserve, Glamorgan, Wales, UK, July.

Nick Upton / Goldenrod crab spider (Misumena vatia) female well camouflaged on a Yellow flag iris (Iris pseudacorus) flower as it waits for prey to land. Kenfig NNR, Glamorgan, Wales, UK, June.

Paul Harcourt Davies / Female Flower crab spider (Misumena vatia) on lavender Umbria, Italy. May.

Paul Harcourt Davies / Female Pink crab spider (Thomisus onustus) sit on back of blue flower waiting to grasp unwary pollinator, Umbria, Italy. May.

Paul Harcourt Davies / Cactus spider (Heriaeus hirtus), a distinctive species of crab spider with bristle hairs, resting on flower head, Umbria, Italy. May.

Paul Harcourt Davies / Napoleon spider (Synema globosum) resting on woody stem, Umbria, Italy. May.

Paul Harcourt Davies / Female Flower crab spider (Misumena vatia) with its cocoon anchored to leaf of sea holy (Eryngium), Umbria, Italy. August.

Paul Harcourt Davies / Cactus spider (Heriaeus hirtus) resting on leaf, Umbria, Italy. June.

Paul Harcourt Davies / Napoleon spider (Synema globosum) sitting and waiting on yellow flower, Umbria, Italy. May.

Paul Harcourt Davies / Cactus spider (Heriaeus hirtus) eating ant as kill on leaf, Umbria, Italy. May.

Bruce Thomson / Flower spider (Thomisus spectabilis) an ambush predator waiting on daisy flower for unsuspecting pollinators, Toowoomba, Queensland, Australia.

Stephen Dalton / Green crab spider (Diaea dorsata) England, UK.

Stephen Dalton / Green crab spider (Diaea dorsata) England, UK.

Stephen Dalton / Green crab spider (Diaea dorsata) England, UK.

Bernard Castelein / Crab spider (Misumena vatia) on Heather (Calunna vulgaris) Klein Schietveld, Brasschaat, Belgium

Bernard Castelein / Crab spider (Misumena vatia), on Heather (Calunna vulgaris) Klein Schietveld, Brasschaat, Belgium

Alex Hyde / Crab spider (Xysticus sp.) juvenile, awaits its unsuspecting insect prey. Once they have found a suitable site for an ambush, these spiders grab their prey with their first two pairs of legs rather th...

Alex Hyde / Bird dropping crab spider (Phrynarachne sp.). This species mimics a bird dropping, affording it protection from potential predators. It also serves to attract insect prey such as flies, with the spide...

Alex Hyde / Bird dropping crab spider (Phrynarachne sp.). This species mimics a bird dropping, affording it protection from potential predators. It also serves to attract insect prey such as flies, with the spide...

Etienne Littlefair / Green-ant mimicking spider (Amyciaea albomaculata), Adelaide River, Northern Territory, Australia, March.

Etienne Littlefair / Australian crab spider (Thomisus spectabilis) exuding venom defensively, Arnhem escarpment, Northern Territory, Australia, December.

Rod Williams / Crab spider (Misumena vatia) female predating a Honeybee (Apis mellifera) Sutcliffe Park Nature Reserve, Eltham, England, UK. London, August.

Ross Hoddinott / RF - Crab spider (Misumena vatia) waiting for prey on Meadow thistle (Cirsium dissectum) flower. Dunsdon Devon Wildlife Trust Reserve, England, UK. June. (This image may be licensed either as rights m...

Ross Hoddinott / Crab spider (Misumena vatia) waiting for prey on Meadow thistle (Cirsium dissectum). Dunsdon Devon Wildlife Trust Reserve, England, UK. June.

Nick Upton / Crab spider (Xysticus cristatus) waiting for insect prey on a Woolly thistle (Cirsium eriophorum) flowerhead in a chalk grassland meadow, Wiltshire, UK, August.

Nick Upton / Goldenrod crab spider (Misumena vatia) hunting on Bell heather (Erica cinerea) flowers on heathland, Dorset, UK, August.

Emanuele Biggi / Crab spider (Thomisus onustus) waiting in ambush on a cultivated rose in a garden, Mornese, Italy, June.