Insect Identification
Insect Identification

Red Ant-Mimic Spider - (Castianeira sp.)

Authored By Staff Writer | Last Updated: 1/28/2014

Red Ant-Mimic Spiders are clever little arachnids. Their disguise gives them access to more than just safety from potential predators.

Red Ant-Mimic Spiders play both sides of the game: defense and offense. Their ability to be confused as red ants helps keep their predators at bay. It also allows them to get very close to their unsuspecting red ant prey.

Red Ants are usually found in or near their colonies. When one is injured, others will come and their bites are annoying, if not painful, to a predator. Red Ant-Mimic Spiders can take advantage of the wide berth they are given by other invertebrates. They can also get close enough to kill and eat an ant without drawing alarm because it blends in well with the species. Other insect prey that are indifferent to the presence of ants will not see an attack coming until it is too late.

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Category: Spider
Common name: Red Ant-Mimic Spider
Scientific Name: Castianeira sp.

  Kingdom: Animalia
   Phylum: Arthropoda
    Class: Arachnida
     Order: Araneae
      Family: Corrinidae
       Genus: Castianeira
        Species: sp.

Adult Size (Length): 3mm to 5mm (0.12in to 0.20in)

Identifying Colors: orange; red; brown

Additional Descriptors: ant

North American Reach (Though Not Limited To*): Alabama; Florida; Georgia; Louisiana; Mississippi

* Keep in mind that insect reach is not governed by lines on a map and therefore may appear in areas/regions/states beyond those listed above.