Orange highlights the above-normal warmth of equatorial surface waters in the Pacific that are driving the current El Niño. Image courtesy of NOAA. According to the Cornell Lab of Ornithology, the El Niño weather phenomenon warming Pacific waters to temperatures matching the highest ever recorded, participants in the 2016 Great Backyard Bird Count (GBBC), may be in for a few surprises. The 19th annual GBBC is taking place worldwide February 12 through 15. Information gathered and reported online at birdcount.org will help scientists track changes in bird distribution, some of which may be traced to El Niño storms and unusual weather patterns. “The most recent big El Niño took place during the winter of 1997-98,” says the Cornell Lab of Ornithology’s Marshall Iliff, a leader of the eBird program which collects worldwide bird counts year-round and also provides the backbone for the GBBC. “The GBBC was launched in February 1998 and was pretty small at first.