A Permanent Quarantine Zone buffer along the Texas/Mexico border works to keep southern cattle fever ticks (Rhipicephalus [Boophilus] microplus from re-establishing in Texas after being eradicated from the U.S. in the 1940s. Periodic outbreaks in south Texas are attributed to a unique landscape suitable for the ticks and their wild hosts, such as white-tailed deer and exotic nilgai antelope. (Photo by iNaturalist user José Edilson Espitia Barrera, CC BY-NC)
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