The Parasitiformes are a superorder of Acari and include ticks and some mites. Ticks are blood-feeding external parasites of animals. There are about 850 species worldwide in two families, Ixodidae (hard ticks), and Argasidae (soft ticks). Both hard and soft ticks are important vectors of disease in humans and other animals.
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- Iowa State Entomology - Ticks Photographs and QuickTime movies of several tick species of North America.
- Tick Research Laboratory at Texas A&M University Detailed information about ticks and tick research in Texas.
- Information on Ticks Articles on the identification and removal of ticks.
- Iowa Insect Notes: American Dog Tick About Dermacentor variabilis and its control, with photographs illustrating the life stages of this and other ticks found in the region, including deer tick (Ixodes scapularis) and lone star tick (Amblyomma americanum).
- University of Rhode Island Tick Research Laboratory Research and information on ticks and tick-borne diseases. Includes sketches, photos, size comparison, and morphological descriptions of ticks found in Rhode Island.
- Ticks Photographs and information on the brown dog tick and the American dog tick, their importance and control.
- Rhipicephalus sanguineus Photographs of male and female brown dog ticks, with information on the transmission of canine piroplasmosis (Babesia canis) and tropical canine pancytopenia (Ehrlichia canis).
- Dermacentor nitens Photographs of the tropical horse tick, the only species known to be a natural vector of equine babesiae (Babesia caballi) in the New World.
- Argas miniatus Photographs of these fowl ticks which infest birds and bats.
- Ornithodorus talaje This tick infests reptiles, birds and mammals. Photographs of an adult and an unidentified larva of the same genus.
- Boophilus microplus Photographs of adults and larvae of the southern cattle tick.
- Amblyomma cajennense Photographs of several engorged female ticks and information on this known vector of Rickettsia rickettsii, the cause of spotted fever.
- Ixodes scapularis: Deer Tick Research project by Brianna Clarin on this species, including its classification, habitat, reproduction, adaptations, nutrition and interactions with other species.
- Blacklegged Tick: Ixodes scapularis Photographs and information on the natural history of this deer tick that can carry Lyme disease.
- Ixodes scapularis: Blacklegged or Deer Tick Provides photographs and a description of this tick, with information on its distribution, life cycle, medical significance and management.
- Rhipicephalus sanguineus: Brown Dog Tick Provides photographs and a description of this tick, with information on its distribution, life cycle, medical and veterinary significance and management.
- Ixodes scapularis: Deer Tick Student project including classification, habitat, adaptation, nutrition, reproduction and interactions with other species.
- Rhipicephalus sanguineus: Brown Dog Tick Photographs of this species with information on its habitat, life cycle and description.
- Ixodes scapularis: Black-legged or Deer Tick Photograph and information on this parasite, its habitat, life cycle, description and control.
- Amblyomma americanum: Lone Star Tick Photographs of this species with information on its habitat, life cycle and description.
- Dermacentor variabilis: American Dog Tick Photographs of this parasite and information on its habitat, life cycle and description.
- Lyme Disease and Tick Management University of Nebraska Cooperative Extension factsheet and audio on ticks and Lyme disease, including images of several tick species and life stages.
- MedlinePlus: Tick Bites Information about ticks and tick-borne diseases.