Williamsson's Sapsucker at Sap-well

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Sapsuckers (for use with one of three sapsucker photos)<br />
The creation of sap wells by Yellow-bellied, Red-breasted, Red-naped, and Williamsson’s Sapsuckers is a keystone function providing food for a wide array of insects, mammals and birds; particularly hummingbirds, some of which (such as the ruby-throated and rufous) are thought to time their migration to take advantage of the sugar-rich sap produced when trees begin to leaf out.
Sapsuckers (for use with one of three sapsucker photos)
The creation of sap wells by Yellow-bellied, Red-breasted, Red-naped, and Williamsson’s Sapsuckers is a keystone function providing food for a wide array of insects, mammals and birds; particularly hummingbirds, some of which (such as the ruby-throated and rufous) are thought to time their migration to take advantage of the sugar-rich sap produced when trees begin to leaf out.

Filename: Williamson_Sapsucker_2045__April_8__07.tif
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