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Garrett, K.L. 2006. Swifts. Pages 341-346 In Alderfer, J. (ed.). 2006. Complete Birds of North America. Washington, D.C.: National Geographic Society. 696 pp.

Garry Oak Recovery Team. 2003. Field Manual - Species at Risk in Garry Oak and Associated Ecosystems in British Columbia. Available here.

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Gill, F.B., R.A.Canterbury, and J.L.Confer. 2001. Blue-winged Warbler (Vermivora pinus). In The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology. Available here.

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