Ohlone Audubon Society

Serving Southern and Eastern Alameda County


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May Virtual Membership Meeting: Golden Eagle Population Surveys and Territory Monitoring in the Northern Diablo Range
Tuesday 04 May 2021, 07:30pm
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TopicGolden Eagle Population Surveys and Territory Monitoring in the Northern Diablo Range, California

Presenter: Patrick Kolar 

The northern Diablo Range of west-central California supports one of the largest known breeding populations of golden eagles (Aquila chrysaetos) in the world.  This region includes the Altamont Pass Wind Resource Area  (APWRA) where collisions with wind turbines constitute a substantial source of mortality for golden eagles and other raptors.  From 2014-2020, US Geological Survey (USGS) used a broad-scale survey design to examine spatial patterns in territory occupancy and reproduction by golden eagles based on surveys completed across a 5,170 -km2region includingthe APWRA.  This presentation will provide an overview of population ecology ofgolden eagles in the northern Diablo Range and discuss how findings from USGS’s research can helpminimizepopulation-level impacts of wind-turbine collisions and other stressors to golden eagles.  

Patrick Kolar is a wildlife biologist with the US Geological Survey – Forest and Rangeland Ecosystem Science Center.  He received a Bachelor‘s degree in Fish and Wildlife Management from Montana State University in 2003 and a Master’s degree in Raptor Biology from Boise State University in 2013.  Since 2014 he has been studying raptor populations in the Northern Diablo Range Mountains of California.



During to COVID-19, Ohlone Audubon’s membership meeting will be online via Zoom until further notice. 

Pre-registration for meeting participation is required however you do not need to be a member to pre-register and join the meeting.

To register for the membership meeting, please follow the link on our Membership Meeting page


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