This video from California is called Hundreds of Hummingbirds at Bird Feeder.
By Melissa Mayntz in the USA:
How to Keep Hummingbird Nectar From Freezing
Feeding Winter Hummingbirds
Hummingbirds are some of the most desirable backyard birds, and while they’re typically only found in most backyards during the summer – with the exception of the Anna’s hummingbird, a year-round Pacific Coast resident – the occasional hummingbird can overwinter in northern areas. This brings up the problem of how to keep hummingbird nectar from freezing so these tiny birds always have a reliable source of food even when flowers may not be blooming.
The Dangers of Cold Weather
Hummingbirds have a high metabolism, and while they have ways to keep themselves warm, including going into a torpor at night to preserve energy, a sudden cold snap can be deadly if they don’t have a reliable source of nectar…
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