Tamarisk Beetle Maps

Each year, with the help of numerous partners across thirteen states and Mexico, RiversEdge West produces an annual distribution map that notes the presence and absence of Diorhabda spp. from sampling sites across the west.
These data in no way represent all locations where the tamarisk beetle may exist, but give a broad perspective of beetle dispersal, providing land managers with information that may help with their integrated pest management plans, restoration strategies, and funding opportunities.
If you would like to track the tamarisk beetle and to aid in data collection for the largest ongoing ecological experiment in North America, please visit our tamarisk beetle monitoring program page.

2021 Tamarisk Beetle Distribution Map


2021 Summary:

As populations ebb and flow, it is even more important to track where the beetles are found and where they are absent. Monitoring is proving to be more and more important as the beetle has not been present in the system for long and the dynamics of population movement and stability are not yet understood. 
Thank you to all of our many partners for providing the data represented in this year's map!  
The production of the Annual Tamarisk Beetle Distribution Map is generously funded by a grant from the Walton Family Foundation.

2021 Interactive ArcGIS Online Beetle Data Map

Previous Years' Distribution Maps




RiversEdge West's

mission is to advance the restoration of riparian lands through collaboration, education, and technical assistance.