In 2015 the species was again under consideration for protection under the California Endangered Species Act. This time, however, partners at California Audubon were armed with new information, thanks largely to the work of Dr. Orin Robinson—a Cornell Lab of Ornithology Postdoctoral Fellow in Conservation Science who has been studying Tricolored Blackbirds for the past two years.
Robinson's work combined data in eBird, a citizen-science project logging millions of bird sightings, with survey data from partners at UC Davis to develop new trend estimates for the state's Tricolored Blackbird population. By combining these data sets, Robinson developed a statistically reliable population model showing Tricolored Blackbirds declined more than 33 percent during just the past 10 years.
Explore further: Survey says 'California's blackbird in sharp decline
More information: Orin J. Robinson et al, Using citizen science data in integrated population models to inform conservation, Biological Conservation (2018). DOI: 10.1016/j.biocon.2018.10.002
Journal reference: Biological Conservation 
Provided by: Cornell University
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