For a good part of the year, the colorful rufous hummingbird can be spotted all over Portland. After nesting and breeding here in the summer and fall, these feisty hummers migrate some 2,000 miles southward to winter in Mexico. But over the next few decades, the tiny bird is expected to become increasingly rare in Portland. Climate change is likely to alter its travel plans, which include the longest annual migration of any hummingbird species. Its range is likely to shift northward, according to predictions in a new report from the National Audubon Society. The rufous, like hundreds of other...