Male Calypte anna - used with permission from


Altshuler, D.L., K.C. Welch, Jr., B.H. Cho, D.B. Welch, A.F. Lin, W.B. Dickson, and M.H. Dickinson. 2010. Neuromuscular control of wingbeat kinematics in Anna’s hummingbirds (Calypte anna). The Journal of Experimental Biology: 2507-2514.

Anna’s Hummingbirds 2002. <URL:>. Accessed 8 March 2014.

Animal Diversity Web. <URL:>.  Accessed 21 March 2014.

Beuchat, C. A., S. B. Chaplin, M. L. Morton. 1979. Ambient temperature and the daily energetics of two species of hummingbirds, Calypte anna and Selasphorus rufus. The University of Chicago Press: 280-295. 

BioExpedition. <URL:>. Accessed 14 April 2014.    

BirdWeb. <URL:>.  Accessed 17 March 2014.

California Bureau of Land Management. <URL:>. Accessed 2 March 2014.

Carpenter, F.L. and J.L. Castronova. 1980. Maternal diet selectivity in Calypte anna.  American Midland Naturalist: 175-179.

Clark, C.J. 2009. Courtship dives of Anna’s hummingbird offer insights into flight performance limits.  The Proceedings of the Royal Society: 3047-3052.

Clark, C. J. and T. J. Feo. 2008. The Anna’s hummingbird chirps with its tail: a new mechanism of sonation in birds. The Proceedings of the Royal Society: 955-962.

Copenhaver, C. and P. W. Ewald. 1980. Cost of territory establishment in hummingbirds. Oecologia: 155-160.

The Cornell Lab of Ornithology 2011. <URL:>.  Accessed 17 March 2014.

Eberhard, J. R. and P. W. Ewald. 1993. Food availability, intrusion pressure and territory size: an experimental study of Anna’s hummingbirds (Calypte anna). Behavioral Ecology and Sociobiology: 11-18.

Evangelista, D., M.J. Fernandez, M.S. Berns, A. Hoover, and R. Dudley. 2010. Hovering energetics and thermal balance in Anna’s hummingbirds (Calypte anna).  The University of Chicago Press: 406-413.

Hummingbird Market 2014. <URL:>. Accessed 12 April 2014.

McWhorter, T.J., B.H. Bakken, W.H. Karasov, and C. Martinez del Rio. 2005. Hummingbirds rely on both paracellular and carrier-mediated intestinal glucose absorption to fuel high metabolism.  The Proceedings of The Royal Society: 131-134. 

Ortega-Jimenez, V.M. and R. Dudley. 2012. Flying in the rain: hovering performance of Anna’s hummingbirds under varied precipitation.  The Proceeding of the Royal Society: 3996-4002.

South Dakota Birds and Birding. <URL:>. Accessed 3 April 2014.

Stiles, F.G. 1971.  Time, energy, and territoriality of the Anna Hummingbird (Calypte anna).  Science: 818-821.

The Wild Bird Store 2014. URL: <>.  Accessed 18 March 2014.