Tamarisk Beetle Maps

Each year, with the help of numerous partners across thirteen states and Mexico, TC 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 participate in the program or help fill any "gaps" you may see in current data on the map, please visit our tamarisk beetle monitoring program page.

2016 Tamarisk Beetle Distribution Map

2016 Interactive ArcGIS Online Beetle Data Map


Key takeaways from the 2016 map:

  • Beetle distribution continues to ebb and flow across North America  
  • NM:  The beetles expanded along the Middle Rio Grande, bringing southern and northern populations together as they moved through Elephant Buttes Reservoir and into Bosque del Apache NWR  
  • The beetles now occupy all of the Middle Rio Grande and caused massive late-season defoliation in major Southwester Willow Flycatcher territories. Beetles are also moving west from the Rio Grande towards the Gila River watershed near Silver City, NM as well as along the I-10 corridor to Lordsburg, NM
  • AZ:  The beetles also made a large push southward down the Lower Colorado River from Davis Dam, through the Lake Havasu area, as far south as Parker, AZ and into the Bill Williams River.
  • UT:  In Grand County Utah, near Moab, the beetles were in the largest numbers since 2013 and suggest the typical predator-prey cycle is a likely future pattern for beetle populations
  • TX, OK, KS: Populations in west Texas, the Pecos River drainage in New Mexico, and Arkansas River in Colorado continued to have relatively low numbers of beetles present, while populations across plains in north Texas, Oklahoma, and Kansas seem to have virtually disappeared.  Populations along the Rio Grande and Big Bend area of Texas rebounded this year with large numbers and heavy defoliation
TC would like to thank more than 40 partners directly involved in providing data for 2016, and more than 70 partners that have provided data during the span of TC's involvement in tracking beetle locations across the west. 
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.
To become involved in helping to track the tamarisk beetle and to aid in data collection for the largest ongoing ecological experiment in North America, please visit our website or contact Ben Bloodworth directly at bbloodworth@tamariskcoalition.org.
The production of the Annual Tamarisk Beetle Distribution Map is generously funded by a grant from the Walton Family Foundation.
Previous Years' Distribution Maps

For more information contact Ben Bloodworth at bbloodworth@tamariskcoalition.org 



Tamarisk Coalition's

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