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Summer light-morph adult (July), Colorado.
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Intermediate adult (March), Texas. Note extent of brown barring below.
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Summer adult (June), Montana.
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Hatch-year juvenile (July), California. This bird was not yet flying much on its own and had been banded as a partially-grown nestling just two weeks before this photo was taken.
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Winter immature (December), Washington.
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Winter juvenile (December), Washington.
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Winter juvenile (December), Washington.
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Winter juvenile (December), Washington.
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Winter juvenile (December), Washington.
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Winter immature (December), Washington.
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One-year-old immature, Oregon. After a full year, immatures often show very faded heads. Swainson's Hawks are one of just a few raptors that have a true "sub-adult" plumage that is intermediate between and adult and juvenile aspects.
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Light-morph, likely female. Light-morph can show variable amounts of brown barring below the solid bib across the breast. Note that the wing linings of this bird are pretty clean white.
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Summer, intermediate adult (July), California.
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Summer, intermediate adult (July), California.
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Dark-morph adult. Note rusty underwing coverts and tail pattern.
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(April), California.
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(April), California.
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Molting immature (April), California.
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Dark-morph immature. Note mostly dark underparts and dark wing linings.
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Winter immature (December), Washington.
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Winter immature (December), Washington.
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First-summer sub-adult (June). This one-year-old bird shows extensive white in the scapulars and wing coverts and a paler head. Fading sometimes results in first-summer birds looking almost white-headed.
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One-year-old immature, Oregon.
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Summer light-morph adult (August). Note solid dark head with no white mottling, clean white throat and restricted white on forehead around the base of the bill.
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Adults at a nest (July).
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Eggs collected by John M. Campbell near Socorro, New Mexico on 11 June 1955 (from the private collection of Manassa Schrock).
Photo Info