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Amateur Astronomers Association of Pittsburgh
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American Birding Association
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Archives of PA Birds list by the Audubon Society
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Botanical Society of Western PA
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Cornell Lab of Ornithology
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Herring Gull Nest Photos by Mark McConaughy:
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Home Grown National Park
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Pennsylvania Society of Ornithology
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PIXCAMS (live video) of birds & animals
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Short-billed Dowitcher Photos by Mark McConaughy:
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Todd Bird Club of Armstrong, Cambria & Indiana Counties of PA
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Three Rivers Birding Club of Southwestern Pennsylvania
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Western Pennsylvania Mushroom Club
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Westmoreland Conservancy
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Westmoreland Land Trust
