Contact: Scott Ferrenberg
University of Colorado at Boulder
Caption: Clockwise from top left: This shows (1) two lodgepole pines growing side-by-side with notably different bark textures, (2) a rough-barked limber pine that has been attacked by bark beetles, (3) a limber pine that has both rough and smooth bark, with pine beetle attacks only on the rough bark, (4) a limber pine with predominantly smooth bark.
Credit: Photo courtesy of Scott Ferrenberg.
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