Spatial distribution and density of Nylanderia pubens (Hymenoptera: Formicidae) on urban lots

Nylanderia pubens (Forel), the Caribbean crazy ant (CCA) is a tropical and subtropical super colony tramp ant. The species was first described from the Greater Antilles Islands and now has spread throughout the Caribbean and to areas of North and South America. In 1950, CCA was first reported in Florida. Today, CCA is spread throughout the state and along the Gulf Coast. The super colony nature of the CCA allows them to spread out across large areas of land, disrupting the natural ecosystem.  This study investigated the spatial distribution and density of CCA on urban lots over the course of two years.  In both years, in March and April, CCA were found in distinct focal points around the lots. As the temperature increased through July and August the density of ants increased and the infestation spread from the distinct focal points to broader areas.  In late September and October, the infestations began to return to the initial focal points. The density of ants also decreased at this time. The results show a rapid growth in population size and range during the warmer months of the year, and indicate that control strategies for CCA should begin early in the year to prevent the spread and increase of an infestation.