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Watch: 'crazy ants' march on Texas
23 counties in the state of Texas are suffering infestations from the so-called "crazy ants". The creatures get their name from their fast, erratic movements, and are causing problems for local ecosystems. Dr Edward LeBrun is from the University of Texas's Brackenridge Field Laboratory.
(Picture: Crazy Ant Credit: Joe MacGown via Mississippi Entomological Museum)
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