How many bird species can be seen in York County in a single year? A dedicated birder can tally 200 or more with reasonable effort, but what if a bunch of birders ranging from casual watchers to serious listers contributed to a single collective list? They have, on eBird, and the 2010 total was 298. [Edit: Not so fast! See my followup on what eBird counts as “species.”] eBird.org is a real-time online checklist program launched in 2002 by the Cornell Lab of Ornithology and National Audubon Society. It makes vast numbers of bird observations accessible and usable. We’re watching … Continue reading →