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Image Number D1048-1 |
At the ARS Bee Research Lab in Beltsville, Maryland, research leader and entomologist Jeffery Pettis uses a grid to measure adult honey bee population as a means to assess the overall health of the bee colonies.
Photo by Peggy Greb.
640 pixels wide: (d1048-1.jpg)
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Last Modified: 01/29/2008
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