Distribution of crazy rasberry ants in low dense urban areas

It seems that the Crazy Rasberry Ant does not like Houston Downtown. Instead it colonizes the suburbs. This fact can be useful for pest controllers and entomologists. The map below shows a general geological map with rivers and streams and the locations where the ants are found until 2007. (See below for the internet resources). Comparing these maps and Google Earth maps learn that the crazy ants do not like dense urban areas. Most of the places are close to the river and streams, also the main roads and in urban areas with a low density.

Find a larger map on ant-maps.com