As warmer weather approaches, multitudes of migrant birds are on track for arrival in North America. Among them are those favorite avian gems, hummingbirds. The spring arrival—or year-round presence—of hummingbirds in yards varies across the country, but current studies point out some new potential challenges to migrating hummingbirds, such as changing bloom times of nectar plants and an earlier arrival of spring on their wintering and breeding grounds. Here we've gathered general guidelines to current hummingbird migration and occurrence patterns for various sections of the country, as well as some tips on the different feeding strategies you can use to attract them to your yard. Additionally, you can also learn more about how to help hummingbirds below. United States east of the Rocky Mountains Over most of the eastern two-thirds of North America, from central Canada southward, the Ruby-throated Hummingbird reigns supreme. Predominantly a neotropical migrant...