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Casa Grande Ruins National MonumentAfternoon view of the Casa Grande from the southwest.
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Casa Grande Ruins National Monument
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A burrowing owl guarding its burrow at Casa Grande Ruins.  

Did You Know?
Burrowing owls are unique among birds because they nest underground in existing ground squirrel, coyote, and badger burrows. They are also commonly associated with humans and will frequently nest in burrows along irrigation ditches, canals, and even in people’s yards.

Last Updated: August 18, 2006 at 19:48 EST