![This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/1934._Three_relative_degrees_of_Dendroctonus_brevicomis_attack%3B_heavy%2C_medium%2C_and_light_on_ponderosa_pine._%2839817485915%29.jpg/800px-1934._Three_relative_degrees_of_Dendroctonus_brevicomis_attack%3B_heavy%2C_medium%2C_and_light_on_ponderosa_pine._%2839817485915%29.jpg)
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current | 02:07, 7 May 2018 | ![]() | 1,622 × 1,084 (407 KB) | OceanAtoll | Transferred from Flickr via #flickr2commons |
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