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to Colorado Birds
I spent all morning today perusing the thousands of birds congregating at Walden Reservoir in Jackson County. A huge surprise was the discovery of over 40 Ring-billed Gull chicks huddled in pairs near a parent on the sandy beach facing north at the gull breeding island. The chicks are whitish compared to the darker brown chicks of the California Gulls. To my knowledge this is the first breeding in Colorado since 1900!