- 3.5 in
- 4.3 in
- 0.1–0.1 oz
- Colibri d'Allen (French)
- Chuparmirto petirrojo, Zumbador de Allen (Spanish)
- Breeding male and female Allen's Hummingbirds have different habitat preferences. The male sets up a territory overseeing open areas of coastal scrub vegetation or riparian shrubs, where he often perches conspicuously on exposed leafless branches. The female selects nest sites in more densely vegetated areas and forests.
- Two subspecies of Allen's Hummingbirds are recognized. They differ only slightly in appearance, but sedentarius of very southern California is nonmigratory, and the more northerly breeding, slightly smaller sasin spends the winter in Mexico.
- The Allen's Hummingbird is remarkably early migrant compared with most North American birds. Northbound birds may depart on spring migration as early as December and arrive on the summer breeding grounds as early as January. Adult males may begin their southward fall migration in mid-May and arrive on winter grounds as early as August.
- The oldest recorded Allen's Hummingbird was 5 years 11 months when she was captured and rereleased in California during banding operations.
Breeds in moist coastal areas, scrub, chaparral, and forests. Winters in forest edge and scrub clearings with flowers.
Flower nectar, small insects, and tree sap. Comes to hummingbird feeders.
- Clutch Size
- 2 eggs
- Egg Description
- Condition at Hatching
- Helpless, with black skin and some down on back.
Open cup of plant down with an outer layer of grass or leaves, covered on outside with lichens, moss, or pieces of bark held on with spider web. Placed in shrub or on small twig or branch of tree.
Hovers at flowers and sap wells, catches insects in flight and plucks them from leaves.
Allen's Hummingbird populations declined by 83% between 1966 and 2014, according to the North American Breeding Bird Survey. Partners in Flight estimates a global breeding population of 700,000 with 100% breeding in the U.S., and 96% wintering in Mexico. This U.S.-Canada Stewardship species rates a 15 out of 20 on the Continental Concern Score, and are on the 2014 State of the Birds Watch List, which lists species most in danger of extinction without significant conservation action.
- Mitchell, D. E. 2000. Allen's Hummingbird (Selasphorus sasin). In The Birds of North America, No. 501 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.
- North American Bird Conservation Initiative, U.S. Committee. 2014. State of the Birds 2014 Report. U.S. Department of Interior, Washington, DC.
- Partners in Flight. 2012. Species assessment database.
- U.S. Department of the Interior, USGS Patuxent Wildlife Research Center. 2015. Longevity records of North American Birds.
- USGS Patuxent Wildlife Research Center. 2014. North American Breeding Bird Survey 1966–2014 Analysis.