The Impact of the Broad-tailed Hummingbirds' Migration
billy barr looks through the logs he's been keeping for almost 50 years. He explains how the glacier lilies emergence is becoming more and more out of sync with the broad-tailed hummingbirds arrival after their long migration up from Mexico. When billy started keeping his records in the 70s they arrived on the same day, today the lily is flowering three weeks before the hummingbird arrives.
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