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Advocates have long fended off proposals that would deplete Arizona's San Pedro River, but today's threats add up to a daunting challenge.
This is a summary of the highest counts reported for individual species and forms in Canada since the Christmas Bird Count (CBC) began in 1900.
This summary covers 120 years of Christmas Bird Counts (CBCs) in the United States. My predecessor, Burt Monroe, summarized the all-time high