To pinpoint where birds need wetlands the most, researchers combined a number of different data sets. For some species, migratory patterns have been observed in radio-telemetry data from long term studies. But this only accounts for a few species. So, the project has partnered with the Cornell Lab of Ornithology to access data from eBird, a crowd-sourced project that allows citizen scientists and bird watchers to log their observations of birds online.
“It has become really popular,” said Dr. Mark Reynolds. The site collects about 3 million bird observations per month. “It gives us the ability to look at the timing of arrival and wintering patterns for migratory birds in California.”