00:04What weighs less than a nickel, travels thousands of miles, and signals spring's arrival?
00:09Hummingbirds.
00:10And they're on the move right now.
00:12Each spring, these tiny birds migrate from Central America and Mexico into the United States,
00:17guided not by the calendar, but by the weather.
00:20Warm air moving north can speed them up, while storms or cold snaps can slow them down or force them
00:25to wait.
00:26For a bird that weighs just a few grams, wind and temperature make all the difference.
00:31Here's the typical timeline.
00:32They reach the Gulf Coast in March, spread into the southeast soon after, move to the Midwest in April,
00:38and arrive in the northeast and upper Midwest by May.
00:41But when spring warmth arrives early or late, that timing can shift.
00:46And this year, there's another challenge.
00:49Extreme heat in the southwest is already drying out flowers hummingbirds rely on for nectar,
00:54limiting one of their key food sources during migration.
00:58So while some are arriving right on cue, others may struggle,
01:01because when it comes to hummingbirds, weather is everything.
01:04And we'll see you next day.
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