Dr. K talks squirrel repellants, squirrel abundance to close Squirrel Week 2016

Can you ever really get rid of squirrels?  Where have all my squirrels gone? Dr. K is the go to guy for answers to your squirrel questions! In his second Squirrel Week interview with the Washington Post, Dr. K talks about whether you can ever really deter squirrels, and what factors influence squirrel density and abundance. Read the full story here:



New publication on modeling invasion and management of non-native squirrels

A new publication by KCRL post-doctoral researcher Dr. Emily Goldstein outlines how Spatially Explicit Population Models can be used to model future range expansion of an invasive squirrel species (the Eastern gray squirrel; Sciurus carolinensis) and assess the efficacy of different management scenarios and biological control strategies including immunocontraceptive vaccines and culling.  This research outlines proactive management and control strategies that can be implemented to slow the spread of gray squirrel invasion in Ireland.

Read it here: http://link.springer.com/article/10.1007/s10530-016-1092-7/fulltext.html


Dr. Goldstein taking measurements on an Eastern gray squirrel in Ireland

4 new graduate assistantships with KCRL

Great graduate research opportunities for 2016 – follow links for more details.  Come join our research group!

Narrow-headed Gartersnake conservation: University of Arizona

More here: http://wfscjobs.tamu.edu/jobs/phd-grad-assistantship-narrow-headed-gartersnake-conservation-university-of-arizona/

Sonoran tiger salamander movement ecology: University of Arizona

More here: http://wfscjobs.tamu.edu/jobs/ms-grad-assistantship-sonoran-tiger-salamander-movement-ecology-university-of-arizona/

Mt Graham red squirrel management: University of Arizona

More here: http://wfscjobs.tamu.edu/jobs/phd-grad-assistantship-mt-graham-red-squirrel-management-university-of-arizona/

Big Cypress fox squirrel occupancy: University of Arizona

More here: http://wfscjobs.tamu.edu/jobs/phd-grad-assistantship-big-cypress-fox-squirrel-occupancy-university-of-arizona/

KCRL grad students win big at the Arizona & New Mexico TWS Joint Annual Meeting

KCRL doctoral candidates Sarah Hale and Jonathan Derbridge swept the major student awards for the Arizona chapter of The Wildlife Society at the 2016 Arizona & New Mexico Joint Annual Meeting of The Wildlife Society and the American Fisheries Society in Flagstaff Arizona this week.

Sarah won the Best Student Presentation award and was selected from a pool of 6 excellent presentations from Master’s and PhD students.  This is an intense competition where students are required to submit their presentations and a write up of their research in advance of the meeting. The 6 top students are then selected from this pool and the winner is decided based on their presentation during a special session at the Joint Annual Meeting.  Way to go Sarah!!

Jonathan receive the Roger Hungerford Award for a top student in wildlife research who, while attending an Arizona college or university, made significant contributions to the management and conservation of Arizona’s wildlife and/or habitat. Contributions are in the areas of wildlife research, education and training, management, conservation, or law enforcement. The Award is given in memory of one of Arizona’s finest research biologists, Roger Hungerford.  Nicely done Jonathan!!

Congrats all around – keep up the good work, we are all glowing with pride.


Dr. Koprowski with his star students Sarah Hale and Jonathan Derbridge

Abert’s and red squirrel landscape level habitat use: similarities and differences

A new publication from KCRL alum Sandy Doumas on landscape characteristics associated with Abert’s squirrel (Sciurus aberti) and red squirrel (Tamiasciurus hudsonicus) feeding sign in a mixed conifer forest in northern Arizona, where the two species naturally co-occur. This research demonstrates that, while differences in forest use occur between the species, both red and Abert’s squirrels use a variety of conifer vegetation types, information important for future management plans.  Congrats Sandy!

Read it here!

Doumas, S. L., J. L. Koprowski, and W. O. Noble. 2016. Landscape-level assessment of Abert’s squirrel and red squirrel in mixed conifer forest. The Southwestern Naturalist 60:240-246. PDF of Article


Invasive, edge-adapted species and native, forest-dependent species respond very differently to roads and traffic

KCRL alum Dr. Hsiang Ling Chen’s dissertation research documenting the behavioral responses of introduced Abert’s squirrels (Sciurus aberti) and native, endangered Mt. Graham red squirrels (Tamiasciurus hudsonicus grahamensis) was just published in PLoS ONE. This research demonstrates the importance of considering both behavior and ecology of a species when considering potential impacts of roads.  Congrats Dr. Chen!!!

Read it here!

Chen, H. L. and J. L. Koprowski. 2015. Differential effects of roads and traffic on space use and movements of native forest-dependent and introduced edge-tolerant species. PLoS ONE 11:e0148121 doi:10.1371/journal.pone.0148121. PDF of Article



Red squirrel road crossing sign. Image from Saving Scotland’s Squirrels. www.scottishsquirrels.org.uk