Quote:
a project run by the University of Wisconsin-Madison Arboretum — we're keeping a close eye on the hummingbirds' progress as they head our way. In recent weeks, we've seen an explosion of activity in the south, with the northernmost sighting in Irmo, South Carolina.
So far, they're a little behind schedule compared to 2018. Last year at this point, they had made it as far as North Carolina.
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I don't understand how those tiny birds make that migration of hundreds or a thousand miles?
Hummingbirds eat like a wood chipper, voracious. They eat more insects than nectar. They can lose 10% of their body weight overnight while sleeping, unless they go into a torpor where they only lose 1% but are extremely vulnerable. So how do they eat enough and travel?