adult, light phase; dark chest, light belly (California, USA; 2008-03-25)
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Swainson's Hawk
Buteo swainsoni
Native Range:
North America and Middle America
Notes:
a highly variable hawk of open grassland;' comes in several plumage phases including light, dark (melanistic) and various degrees of intermediacy; often migrates in groups, roosting on the ground on in trees at night before continuing the journey the next day by catching thermals and rising high into the sky; such a soaring flock is called a 'kettle'; this species primarily eats small mammals supplemented with large insects such as grasshoppers.
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adult, light phase; white underwing areas (California, USA; 2008-03-25) |
juvenile, intermediate phase (California, USA; 2008-03-25) |
adult, dark phase; melanistic underparts (California, USA; 2008-03-25) |
intermediate phase (California, USA; 2008-03-25) |
darker version of intermediate phase (California, USA; 2008-03-25) |
another intermediate phase bird (California, USA; 2008-03-25) |
light or intermediate phase, and dark phase (California, USA; 2008-03-25) |
light or intermediate and dark phases (California, USA; 2008-03-25) |
light, intermediate, and dark phases (California, USA; 2008-03-25) |
several phases, showing extensive variability (California, USA; 2008-03-25) |
a large kettle rising on a thermal (California, USA; 2008-03-25) |
looking down at photographer (Mexico; 2011-03-25)
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