A Surprising Fact about the Anna’s Hummingbird

Here is a very interesting and surprising fact about the Anna’s Hummingbird: it was originally only found on the Pacific slope from Baja California to San Francisco. This bird has increased its population and expanded its breeding range in recent years to Vancouver, British Colombia, and east to southern Arizona. This expansion is believed to be due to the introduction of exotic flowering plants, especially Eucalyptus, red-hot-poker and tree tobacco, and by the proliferation of hummingbird feeders.