Dry weather affecting the Bay Area bird population

In Northern California and around the world, thousands of bird enthusiasts are bundling up, grabbing binoculars and heading outdoors to count birds at the crack of dawn.

The Audubon Society's 114th Christmas bird count is midway through its annual three-week run, but early reports indicate that some birds are shunning California, likely because of drought conditions and unseasonably warm weather.

Of all the factors that can affect bird numbers, "water is certainly the most important," said Garrison Frost, director of marketing and communications at Audubon's San Francisco offices.

Volunteer "citizen scientists" in Oakland, the Central Valley, and Lake and Mendocino counties have reported that the numbers of waterfowl, shore birds and some others appeared to be down so far during this year's Christmas bird counts, held Dec. 14 through Jan. 5.

Those and other birds like to feast on the plants, insects and other creatures that are nurtured by water, Frost said. If there's a shortage of food, they won't stop by, he said.

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