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Written By:
Bill Graham


Green Ridge, Mo. -- Three research biologists stood motionless, listening for one meek call among the many louder bird songs and trills wafting across a grassy field on a recent spring morning.

Levi Jaster and two assistants spend many mornings searching for Henslow’s sparrows, tiny, four-inch birds weighing less than an ounce that live reclusively in tall prairie grasses. The biologists’ experienced ears picked out the thin chirp from other sounds.



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