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Swainson's Hawk

Buse de Swainson

Buteo swainsoni

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Species: The Swainson's Hawk (Buteo swainsoni), is observed on the western prairies and lesser treed regions of North America. Feeds on small animals and insects, such as ground squirrels and grasshoppers. Similar in size to the Red-tailed Hawk, but more lean, with longer and pointier wings. Commonly, seen perched on fence posts along highways.

Distinctions: The male and female are similar looking, female larger in size, dark feathered head. Dichromatic in nature, seen from light coloured bodies, through shades of intermediate, to dark brown bodies. Light coloured birds can be easily be distinguish from other hawk species by their dark bibs. Has one subterminal tail band, with multi-small dark bands. Displays four distinguished primaries, visible, when flying, wings slightly dihedral when soaring. Juveniles lighter in colour, develops mature plumage over a couple of years.

Voice: Mostly silent, may at times give a low sounding whistle.

Nesting: Two to four, multi-coloured blue, green, white and brown eggs, one brood per year. Nest is constructed in gullies or small groves of trees. Built using branches, sticks, bark and plant fibres. Reuses nest from prior years.

Birds of North America

Life, Habitat and Pictures of the Swainson's Hawk

B L W W W Family Latin Name
19" 48.3cm 51" 129.5cm 1.9 lb 861.8g Accipitridae Buteo swainsoni

  • Summer
  • Year Around
  • Winter

Distribution: Commonly, seen throughout the mid-west prairies, from Manitoba, west to southern British Columbia, south into eastern California, east to Texas, and up through the mid-west states, including a small region in the northern parts of the Yukon Territory. Migrates into South America in the early fall, seen in migration kettles, as large, as a couple thousand hawks at a time.

References to Other Bird Sites:

These are links to websites pertaining to the different birding institutions, societies and organizations here in North America. Some of these same sites are a great asset to seeking out knowledge on birds in other regions of the world. Each of these links offer the user different methods to identify birds, whether it be by regions, habitat, appearance or maybe colour. Knowledge on the possibilities of where and what birds might be present are included.

Avibase - the world bird database This site provides the user with a complete list of bird species, broken down per country, or in the example of the US or Canada, per state and province. Here, bird species names are available in other languages, a great asset to be used as a translation of foreign bird names.

ABA - American Birding Association This site represents an organization that maintains official records of all birds species that have been proven to have been seen inside the perimeters of the North American Continent and the surrounding bodies of water. Regular revised versions are posted to keep the bird list current at all times. This is the list used by all serious birders over their lifetime. You may be aware of the movie called the "Big Year". It was with this list that all the competing birders used in an attempt to set a new record as to how many bird species that could be seen by an individual birder in one calendar year.

The description to follow is taken from the AOS Home Page.

AOS - The American Ornitholgy Society is an international society devoted to advancing the scientific understanding of birds, enriching ornithology as a profession, and promoting a rigorous scientific basis for the conservation of birds. As one of the world's oldest and largest ornithological societies, AOS produces scientific publications of the highest quality, hosts intellectually engaging and professionally vital meetings, serves ornithologists at every career stage, pursues a global perspective, and informs public policy on all issues important to ornithology and ornithological collections. AOS is distinguished by its tremendous collective expertise, including eminent scientists, conservation practitioners, early career innovators, and students.

eBird - TheCornellLab of OrnithologyeBird is a must for any individual, who has an interest in birds. This site allows users to sign up and participate in recording birds seen on a daily basis as well as the location, for any bird species seen in the world. In addition, users can use the existing data to search out the location of bird species throughout the year. By using filters, information as to the movements can be determined. Photos can be added to identify individual birds. Migration pattern can be calculated using information by months or years as needed. Range maps can be verified, allowing the users to see where the presence of individual bird species are expected to be at certain times of the year.

NA - National Geographic The Society of National Geographic provides some of the best books available for those who have an interest in birds. The book called "The Complete Birds of North America", is a book recommended to be part of any birders library. This book covers all the native and vagrant species of birds seen on the North American Continent. It provides information on all the birds listed on the ABA bird list. This book goes into great details, describing the individual species and their races. That aside, their website provides wonderful information pertaining to many articles regarding nature.

I hope you will take advantage of these suggested websites. I have used each of them, in one way or another, throughout the years in my quest to better identify and understand our fine feathered friends.

Classic Collection of North American Birds