Field Notes
U.S. Fish & Wildlife Service
Field Notes Entry   
Another Season of MAPS Banding Completed at Leslie Canyon NWR
Southwest Region, August 3, 2011
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A SBNWR Intern Removes a Recaptured Ash-throated Flycatcher from one of the stations mist nets
A SBNWR Intern Removes a Recaptured Ash-throated Flycatcher from one of the stations mist nets - Photo Credit: Christopher D. Lohrengel

A Monitoring Avian Productivity and Survivorship (MAPS) program on Leslie Canyon National Wildlife Refuge has been conducted since 2002. The MAPS program is a cooperative effort designed to provide long-term data on population and demographic parameters for target landbird species. The information collected will provide a better understanding for the productivity, survivorship, and population trends of avian communities on the Leslie Canyon National Wildlife Refuge.


The 2011 MAPS season resulted in a total of 385 bird captures representing 53 species (0.71 birds per net-hour). 41 (11%) of the captures were re-captures from previous efforts. This compares to 2010 season data, which resulted in 217 bird captures representing 40 species (0.40 birds per net hour) including 25 (12%) recaptures. During 2011, several birds were released unbanded, including a few birds that escaped handlers and all hummingbirds, for which refuge staff do not have a permit to band.

The number of bird captures was intermediate during 2011 when compared with previous years. Temperatures were typical and favorable during this year’s banding period, but precipitation at the banding site remained atypically low throughout the monsoon season. The continued lack of meaningful winter precipitation during the past several years is taking an unprecedented toll on sustained flow in Leslie Creek, which quit flowing at the USGS weir during early 2010 and has never resumed since that time except for very brief periods following rain events. This lack of water seems to be negatively impacting the number of resident and migratory birds and other wildlife supported by the Refuge. Even though Leslie Creek stopped flowing back in February 2010, portions of the stream both above and below the USGS weir remained wet during 2011 in the form of isolated pools, which helped sustain limited numbers of Yaqui topminnow, and perhaps some Yaqui chub and Chiricahua leopard frog tadpoles. These pools were also utilized by resident and migratory birds.

Contact Info: Christopher Lohrengel, 520-364-2104 x.106, chris_lohrengel@fws.gov
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