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Swainson's Hawk

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Scientific Classification

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Conservation

Scientific name: Buteo swainsoni 
Family name: Accipitridae

Are they endangered?  No, they are not endangered on a worldwide level.  (IUCN Redlist: Least concern)  They are yellow-listed on the National Audubon Society’s 2007 Watchlist which means that their numbers are declining in North America and conservation efforts should be made.    

What are their past/present problems?  These birds will die if they eat insects that have been poisoned by insecticides.  They will die if they are sprayed with the insecticide, too.  Some of their prey is dying out and when this happens, the number of eggs they lay decreases. 

Swainson's Hawk

What do they look like?  There are three kinds of Swainson’s Hawk:  light, medium, and dark.  The Light one has a dark brown back, a white belly with brown spots, and a reddish-brown “bib” on its chest.  Its tail is gray with a darker band of color on it.  This is the lightest kind and the rest go from medium browns to all dark brown.
How big are they?  These birds are from 19 to 22 inches long.  If its wings were spread out, they would be about 4 feet wide.
How many eggs do they lay?  The female lays from 2 to 4 white eggs.  The eggs hatch in about a month.
How long do the fledglings stay in the nest?  Nests are made out of what they can find like sticks, leaves, and grass.  The young birds (fledglings) stay in the nest for about six weeks.
When do they hunt?  They hunt during the day, using their talons to catch the prey. (diurnal)
What do they eat?  Swainson’s Hawks like to eat insects, reptiles, and small mammals including MICE!
Where do they live?  They live in Canada, the U.S., Mexico, Central America, and South America.
What kind of place do they like to live in?  They like to live around open grasslands, prairies, farmlands, and deserts that have some trees.
Interesting facts:
These birds migrate each winter because they need to go where there are insects available.
They have a very long migration route compared to other hawks.  They fly from North America to Argentina and back.
These birds sometimes hunt in teams.
This bird will follow tractors to try to eat the prey that the equipment kicks up.  They will also stay close to prairie fires for the same reason.

Works Cited:

Alsop, Fred.  Birds of North America.  New York:  DK Publishing, 2001.

Buteo swainsoni.  11 Dec. 2007.  <http://www.iucnredlist.org/search/details.php/49433/all>.

“Pesticide maker acts to protect hawks in Argentina.”  International Wildlife.  Jan/Feb 1997: p 7.

Schmoker, Bill.  “Re: Owl pictures (etc.).”    E-mail to Club Web.  2 Nov. 2007. 

Swainson’s hawk.  5 Oct. 2007.  <http://www.peregrinefund.org/Explore_Raptors/hawks/swainson.html>.

 


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