Woodpecker holes on a ponderosa pine (Florissant National Monument, Colorado, USA) 1 : 無料・フリー素材/写真
Woodpecker holes on a ponderosa pine (Florissant National Monument, Colorado, USA) 1 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Traces (and trace fossils) are physical evidence of an organism's behavior. Common examples include tracks, trails, burrows, and borings. Seen here are borings in the trunk of a ponderosa pine (Pinus ponderosa) made by woodpeckers. This is in Florissant National Monument, Colorado. The park service reports at least the following woodpeckers species in the area: Williamson's sapsucker, downy woodpecker, hairy woodpecker, and northern flicker.Woodpecker holes are produced by repeated concussion against the surface wood by the bird's beak. These particular woodpecker holes are "xylem wells" - they are made to access tree sap as a food source.Locality: trailside, Petrified Forest Loop Trail, Florissant Fossil Beds National Monument, central Colorado, USA--------------------------------Info. at:natureidentification.com/woodpecker-holes-and-other-sign-... |
| 撮影日 | 2007-07-28 15:59:41 |
| 撮影者 | James St. John |
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