Orientation of sap wells excavated by Yellow-bellied Sapsuckers

Document Type

Article

Publication Date

3-1-2011

Abstract

Ambient temperature may influence selection of foraging sites by organisms that use sap as a primary food source. I examined the spatial orientation of sap wells excavated by Yellow-bellied Sapsuckers (Sphyrapicus varius) on pine trees (Pinus spp.; n = 43) in eastern Kansas. Sap wells were oriented toward the southwest (ā = 246.04°, s = 65.46°, P = 0.004), unlike in previous studies. Benefits of southwesterly sap well orientation may include avoidance of high winds while foraging and increased flow of sap on the sides of trees warmed by afternoon light. © 2011 by the Wilson Ornithological Society.

Publication Source (Journal or Book title)

Wilson Journal of Ornithology

First Page

164

Last Page

167

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