References

Atlas of Breeding Birds in Pennsylvania
Dan Brauning

University of Pittsburgh Press
1992
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The Birds of Pennsylvania
G McWilliams and D Brauning

Cornell University Press
2000
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Annotated List of the Birds of Pennsylvania
Santner and Brauning and Schwalbe and Schwalbe

Pennsylvania Biological Survey
1992
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Codorus State Park
Karen Lippy
Pennsylvania Birds 10:57
PSO
1996
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Annotated List of the Birds of Pennsylvania - Second Edition
Franklin Haas and Barbara Haas

Pennsylvania Biological Survey
2005
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Second Atlas of Breeding Birds in Pennsylvaniua
Andrew Wilson, Daniel Brauning, and Robert Mulvihill

The Pennsylvania State University Press
2012
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