Anna’s hummingbirds were absent from Portland before 1968, but today they are among the city’s most common birds after expanding north | World News
Anna’s hummingbirds have expanded their range across the Pacific Northwest, with a presence in cities such as Portland, Oregon. Once largely associated with California, the small, colourful birds gradually moved north and established populations in Oregon, Washington and British Columbia. Records show that numbers remained low for decades before rising rapidly from the late 1990s….