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Doubling Their Weight
Hummers are big eaters. No animal on earth has a faster metabolism. These tiny birds burn food so fast they often eat 1.5 to 3 times their body weight in food per day. They must visit hundreds of flowers to gather enough nectar. Your gardens and feeders help hungry hummers double their body weight to fuel their migration.

Hummingbird: Doubling Their Weight
Amy Evoniuk