The lone star tick (Amblyomma americanum) is instantly recognizable by the central white marking.

Laboratory animal at the University of Illinois at Urbana-Champaign
American dog tick (Dermacentor variabilis) questing.

Laboratory animal at the University of Illinois at Urbana-Champaign
An Ant-Decapitating Fly (Phoridae, Pseudacteon sp.) attempts to separate a fire ant (Solenopsis macdonaghi) from her nestmates. Lone ants make easier targets.  

Parque Nacional El Palmar, Entre Rios, Argentina
Dermacentor variabilis, the American dog tick.

Archbold Biological Station, Florida, USA
An ant-mugging fly (Milichia patrizii) chases down Crematogaster ants on a South African tree branch.  If the fly can catch an ant, she will force the ant to feed her.

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Solenopsis macdonaghi fire ants attacked by a Pseudacteon ant-decapitating fly.  

Parque Nacional El Palmar, Entre Rios, Argentina
Encyrtid wasp, Comperia merceti, emerging from a parasitized cockroach egg case.  Laboratory colony at the University of Arizona.

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A hornworm rears up when attacked by a parasitic Cotesia wasp.

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Eucharitid wasps (blue insect at right) are specialized parasites of ants. 

Chiricahua Mountains, Arizona, USA
The lone star tick (Amblyomma americanum) is instantly recognizable by the central white marking.

Laboratory animal at the University of Illinois at Urbana-Champaign
The lone star tick (Amblyomma americanum) is instantly recognizable by the central white marking.

Laboratory animal at the University of Illinois at Urbana-Champaign
The lone star tick (Amblyomma americanum) is instantly recognizable by the central white marking.

Laboratory animal at the University of Illinois at Urbana-Champaign
See photo in original gallery.
all images and text © Alex Wild 2001-2013