Hummingbirds in North America are currently experiencing contrasting population changes, and little is known about the factors contributing to these changes. We examined the demography of two species ...

Evolution, Vol. 64, No. 2 (February 2010), pp. 324-335 (12 pages) The remarkable diversity of coloration and species present in hummingbirds has been considered the result of sexual selection. I ...

Sometimes nature surprises us with extraordinary products of evolution. One prime example is the extraordinary sword-billed hummingbird (Ensifera ensifera). These relatively small birds have carved a ...

Anna’s Hummingbird: Present throughout the county in habitat where perches and ample nectar are available. Our only common hummingbird and the only hummingbird that normally spends the winter months ...