Piotr Naskrecki / Ogre-faced Spider (Deinopis sp) do not wait passively for an insect to fall into their web, instead, they cast sticky nets, La Selva Biological Station, Costa Rica

Andy Sands / Common red-legged robberfly (Dioctria rufipes) on leaf waiting to ambush fly prey, Bedfordshire, England, UK, May

Rod Williams / Stripe-legged robberfly (Dioctria baumhaueri) on leaf, Brockley cemetery, Lewisham, London, England, May.

Nick Upton / Violet black-legged robber fly (Dioctria atricapilla) with a hoverfly as prey, chalk grassland meadow, Wiltshire, UK, June.

Nick Upton / Violet black-legged robber fly (Dioctria atricapilla) with Dashed slender robber fly (Leptogaster guttiventris) prey, chalk grassland meadow, Wiltshire, UK, June.

Nick Upton / Common Red-legged Robber Fly (Dioctria rufipes) sun basking on a leaf. Wiltshire garden, UK, May.

Stephen Dalton / Small yellow legged robber fly (Dioctria linearis) with prey, UK

Michael & Patricia Fogden / Ogre-faced Spider (Deinopis sp) in rainforest, Costa Rica

Norbert Wu / Ogre-faced Spider (Deinopis sp) do not wait passively for an insect to fall into their web, instead, they cast sticky nets, Costa Rica

Premaphotos / Common red-legged robber fly (Dioctria rufipes) mating pair, UK

Premaphotos / Common red-legged robber fly (Dioctria rufipes) feeding on a fly, UK

Premaphotos / Small yellow-legged robber fly (Dioctria linearis) feeding on a {Hilara sp} empidid fly, UK