TICK IMAGES

      Other common tick species:

      The American dog tick, Dermacentor variabilis, is frequently found on humans and dogs in Rhode Island during the spring and early summer. Apparently, it plays no significant role in the transmission of Lyme disease and babesiosis but has been implicated in the transmission of several other diseases such as Rocky Mountain spotted fever (R.M.S.F.). Thus, it is important to know which tick has attached and to know if this tick specimen is harboring disease-causing microorganisms.

      The lone star tick, Amblyomma americanum, is another species that often attaches in both its nymphal and adult stages to humans. Although abundant in other regions of the U. S., it is not evenly distributed throughout Rhode Island. This species has also been implicated in the transmission of several diseases, including Lyme disease and Ehrlichiosis.


      Deer Tick Blacklegged (Deer) Tick, Ixodes scapularis.
      Note tear-drop shape and relatively small size. Dorsal sheild is blackish while the body behind it is reddish-brown which fades to grey on engorged specimens.

      American Dog Tick American Dog Tick, Dermacentor variabilis.
      This is the largest and most widespread tick in our area. Note the contrast between the whitish patterned dorsal sheild and the dark-brown body.

      Lone Star Tick Lone Star Tick, Amblyomma americanum.
      This tick is known to occur in large numbers on islands in the Narragansett Bay. Note the metallic looking "star" on the rear of the dorsal sheild and the overall chestnut-brown color.


      A comparison of the three tick species.
      Tick Comparison

      Tick Pics:

        Amblyomma americanum, the Lone Star Tick (larva with penny for size comparison) - via Iowa State University
        Dermacentor variabilis, the American Dog Tick (male) - via Iowa State University
        Ixodes scapularis, the Blacklegged or Deer Tick (male) - via Iowa State University
        Ixodes scapularis, the Blacklegged or Deer Tick (female) - via Iowa State University
        Ixodes scapularis, the Blacklegged or Deer Tick (nymph, engorged) - via Iowa State University
        Ixodes scapularis the Blacklegged or Deer Tick (larva) - via Iowa State University

      Tick Flics:

        Ixodes scapularis (female) [60K], MPEG format or QuickTime [182k]
        Ixodes scapularis (male) [378K], MPEG format or QuickTime [876k]
        Ixodes scapularis (larva) [114K], MPEG format or QuickTime [484k]

      **All of these movies are courtesy of the Iowa State University's Deer Tick Home Page. In addition to the above pics and flics, they have more pictures available.


      Here are a few other examples of Ixodid ticks:

        The Lone Star Tick - male

        The Gulf Coast Tick - female

        The Brown Dog Tick - nymph

        The Brown Dog Tick - male

        The American Dog Tick - larva

        The American Dog Tick - nymph

        The American Dog Tick - male

        The American Dog Tick - female

        The Rabbit Tick - male

        The Rabbit Tick - female

        The Blacklegged Tick - male


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