Fall Hummingbird Migration is Underway - Iowa Wildlife Federation

Fall Hummingbird Migration is Underway

Photography courtesy of Lowell Washburn, all rights reserved.

Mix the sugar water and fill the backyard feeders.  The fall migration of ruby-throated hummingbirds is underway.  For those wishing to obtain eyeball-to-eyeball encounters with these high speed, feathered buzz bombs; there’s no better time than the present.

Although some of the hummingbirds we’re seeing may be homegrown, the bulk of the population is currently arriving from points north – many from as far away as northern Minnesota and Ontario, Canada.  Although hummingbird numbers often peak around mid-September, the migration will continue at reduced levels until withering frosts drive the last stragglers southward.  Most hummingbirds will spend the winter months in Central America.  Some travel even farther.

Getting to those wintering grounds represents no small challenge, of course.  During fall migration, a hummingbird may consume up to half its weight in flower nectar [sugar] each day.  Backyard feeders save time and conserve energy by providing migrants with an unlimited quantity of fuel in one spot.  For southbound ruby-throats, feeders are worth their weight in gold.

The most grueling phase of the annual fall flight begins on the shores of America’s southern coastline.  Guided by starry constellations and powered with wings churning at upwards of 50 beats per second, hummingbirds will leave the Texas mainland and head directly across the Gulf of Mexico.  Exhausting stored fuel reserves and pushing physical endurance to the limit; the birds will cross the entire watery expanse in a single nonstop 500-mile, nighttime flight.  The mad dash flight is an incredible achievement for a bird weighing less than a quarter of an ounce and with a wingspan of only four inches.

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