Hi Alyssa,

The bird in the picture is definitely a Red-tail. The dark eyes would point
to an adult but it's belly band and white breast are very obvious so it could
be a second year Red-tail molting into it's adult plumage.
The distinguishing marks of a Prairie Falcon would be a very obvious malar
mark and no belly band-just streaks on the belly as opposed to the belly band of
the immy Red-tail.
Here's a nice picture of a Prairie where you can see the field marks
http://www.schmoker.org/BirdPics/Photos/Raptors/PrFalconEat.JPG

Simone
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