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A plains cottonwood, and increment borer used to collect 1 cm core

By Fort Collins Science Center
A plains cottonwood, with increment borer used to collect a 1 cm core, and a paper straw used to transport it
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Detailed Description

A plains cottonwood, the increment borer used to collect a core 1 cm in diameter, the core, and a paper straw used to transport the core. Photo by Derek Schook.

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