Guzman, Wyndee A., and Paul Wilson. “Hummingbirds at Artificial Flowers Made to Resemble Ornithophiles Versus Melittophiles”. Journal of Pollination Ecology 8 (May 30, 2012): 67–78. Accessed April 23, 2024. https://pollinationecology.org/index.php/jpe/article/view/164.