White-crowned Sparrow - Zonotrichia leucophrys
White-crowned Sparrows have multiple broods of up to four in some regions. The shorter breeding season in Southern Alberta likely only allows two broods and a third in very exceptional years.
I have seen White-crowned juveniles in the back yard recently and I hear the adults singing more often, which I presume means that courtship and nesting for a second brood is underway.
The photos below show one of the sparrows that has been singing at dawn and dusk.
The next morning, there was a different White-crowned Sparrow on the same perch.
References
The Atlas of Breeding Birds of Alberta. Federation of Alberta Naturalists. 2007.
Baicich PJ, Harrison CJO. Nests, Eggs, and Nestlings of North American Birds. Princeton UP. 2005.
Beadle D, Rising J. Sparrows of the United States and Canada. Princeton UP. 2003.
Fisher C, Acorn J. Birds of Alberta. Lone Pine Publishing. Edmonton. 1998.
Sibley David A. The Sibley Guide to Bird Life and Behavior. Alfred A Knopf, Inc. New York. 2001.
White-crowned Sparrows have multiple broods of up to four in some regions. The shorter breeding season in Southern Alberta likely only allows two broods and a third in very exceptional years.
I have seen White-crowned juveniles in the back yard recently and I hear the adults singing more often, which I presume means that courtship and nesting for a second brood is underway.
The photos below show one of the sparrows that has been singing at dawn and dusk.
The next morning, there was a different White-crowned Sparrow on the same perch.
The Atlas of Breeding Birds of Alberta. Federation of Alberta Naturalists. 2007.
Baicich PJ, Harrison CJO. Nests, Eggs, and Nestlings of North American Birds. Princeton UP. 2005.
Beadle D, Rising J. Sparrows of the United States and Canada. Princeton UP. 2003.
Fisher C, Acorn J. Birds of Alberta. Lone Pine Publishing. Edmonton. 1998.
Sibley David A. The Sibley Guide to Bird Life and Behavior. Alfred A Knopf, Inc. New York. 2001.
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