Allen's Hummingbirds

Allen's Hummingbirds

Hummingbird Information

Allen's Hummingbird (Selasphorus sasin)

 

Male Allen's HummingbirdOverview ... Alternate (Global) Names

Distribution / Habitat ... Subspecies, Ranges and ID

Description and Similar Species ... Breeding / Nesting ... Diet / Feeding

 


The Allen's Hummingbird (Selasphorus sasin) was named after the American collector and taxidermist Charles Andrew Allen (1841-1930), who who first noticed this species in the U.S. and described it to the American scientists. As a result, this species is now known as Allen's hummingbird (Golden Gate Audubon Society, 2003).

This hummingbird summers along the pacific coast of the United States from Oregon to southern California. The nominate race migrates south to winter in Mexico.

A hybrid between the Allen's Hummingbirds and the Anna's Hummingbird has been described as Floresi's Hummingbird, "Selasphorus" floresii (Ridgway, 1909; Taylor, 1909).

 

Allen's Hummingbird, Selasphorus sasin

Alternate (Global) Names:

Spanish: Chispita de Allen, Colibrí de Allen, Zumbador de Allen ...French: Colibri d'Allen, Colibri sasin ...Italian: Colibrì di Allen ... Czech: Kolibrík Allenuv, kolibřík kalifornský ... Danish: Allens Dværgkolibri ... German: Allen Kolibri, Allenkolibri, Allen-Kolibri, Grünrücken-Zimtelfe ... Finnish: Keinukolibri ... Japanese: arenhachidori ... Dutch: Allen-kolibrie, Allens Kolibrie ... Norwegian: Allenkolibri, Chaparralkolibri ... Polish: Rudaczek kalifonijski, rudaczek kalifornijski ... Russian: Колибри Аллена, Селасфорус Аллена ... Slovak: cmelovec sasin ... Swedish: Allens kolibri

 

Subspecies:

 

Rufous Hummingbird (Selasphorus rufus) - MaleRufous Hummingbird (Selasphorus rufus)

  • Selasphorus sasin sasin (Nominate Race)

  • Selasphorus sasin sedentarious - non-migratory subspecies
    • Year-round California residents - found in the Channel Islands or offshore of southern California, as well as the county of Los Angeles (Long, 1997)
    • The non-migratory subspecies is slightly larger than the migratory nominate race.

Allen's Hummingbird, Selasphorus sasinDistribution / Habitat

Nominate Race:

Only the migratory nominate race that occurs in the northern range migrates to the south all the way to winter along the Pacific coast of Mexico (including Baja California) and central Mexico, in the states of Mexico, Morelos and Puebla. They move south during July and August and most will have arrived at their winter destination by the end of October (Johnsgard, 1983).

The breeding (summer) range of the Allen’s hummingbird is continuously distributed along a narrow strip along the Pacific Coast, from southwest Oregon to southern California (Long, 1997). The Allen’s hummingbirds arrive in their breeding territory in northern California and south Oregon no later than February. They are common breeders in the brushy woods, gardens and meadows of coastal California from Santa Barbara north, and the most southern tip of Oregon.

Their migratory paths may go through southern Arizona as well as Nevada, along the Gulf Coast from Texas to Louisiana, and western Washington (Long, 1997). This species is rarely observed in the eastern United States, although it has been recorded in Alabama, Delaware, Georgia and Florida, Illinois, Mississippi, and Missouri.

Subspecies: The subspecies Selasphorus sasin sedentarius is a permanent resident on the Channel Islands off southern California. In the 1960s, this species colonized the Palos Verdes Peninsula of Los Angeles County, but has since spread over much of Los Angeles and Orange Counties.

Allens Hummingbird

 

Allen's Hummingbird, Selasphorus sasinHabitat and Territorial Behavior

The Allen’s hummingbird breeding habitat includes “open or partly wooded areas, including brushy slopes, canyons, willow and dogwood thickets, live oak stands, and chaparral” (Long, 1997). They can also be found in gardens, flower filled mountain meadows and parks.

They are absent from mountainous areas above 9,000 feet, the Mojave Desert, grasslands, and the middle of dense forest because of the absence of hummingbird flowers (Long, 1997).

The male is highly aggressive and territorial. He will chase any other males or other hummingbirds from his territory using aerial flights and intimidation displays. (Cassidy 1990, Stokes 1989, Arizona-Sonora Desert Museum 1998) They have even been seen to attack birds several times larger their own size, even birds of prey, such as kestrels and hawks.

Males and females are not social birds and will defend separate feeding territories.

Male Allen's Hummingbird (Selasphorus sasin)

Breeding / Nesting

Description / Similar Species

Female Allen’s Hummingbird (Selasphorus sasin) Diet / Feeding

They primarily feed on nectar taken from a variety of brightly colored, scented small flowers of trees, herbs, shrubs and epiphytes, their favorite food plants being the “California fuchsia, honeysuckle, Indian paintbrush, madden, monkey-flower, [and] other flowering shrubs.” (Long, 1997).

The use their long extendible tongues to retrieve the nectar while hovering with their tails cocked upward. Sometimes they may be seen hanging on the flower while feeding.

Many native and cultivated plants on whose flowers these birds feed heavily rely on them for pollination. The mostly tubular-shaped flowers actually exclude most bees and butterflies from feeding on them and, subsequently, from pollinating the plants.

In winter, when the flowering season is over, Allen's may drink the sap from holes created by sapsuckers, as a substitute for nectar. They may also frequent local hummingbird feeders for some sugar water. Hummingbirds drink out of bird baths or water fountains where they will either hover and sip water as it runs over the edge; or they will perch on the edge and drink - like all the other birds; however, they only remain still for a short moment.

They also forage for small spiders and insects - important sources of protein particularly needed during the breeding season to ensure the proper development of their young. Insects, such as flies, tiny wasps, and mosquitoes, are commonly caught in flight (hawking); Spiders, ants, small beetles, leafhoppers and aphids are often snatched off leaves or branches, or are retrieved from spider webs.

Species Research by Sibylle Johnson

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Metabolism and Survival and Flight Adaptions - Amazing Facts

Allen's Hummingbird, Selasphorus sasin


 

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