The Mexican spiny-tailed iguanas are providing steady work for trappers such as Wilkins and Harold Rondan, owner of Iguana Lifestyles, an iguana removal company based in North Miami Beach.

The smallest iguana species, however, is the spiny-tailed iguana, which is native to Mexico, can measure in at just under five inches long, and weigh slightly over two ounces. Spiny-tailed iguanas ...