Fred Bassett and other volunteer researchers have challenged the idea that hummingbirds abandon the United States mainland each winter. Their research shows that some Western hummingbird species like Allen's and Black-chinned spend winters along the Gulf Coast. The presence of backyard feeders along the Gulf Coast provides critical food sources and allows more people to observe wintering hummingbirds. Some hummingbirds now return year after year to overwinter in the same areas.