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J. Derr: Pine Warbler
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J. Derr: Townsend's Warbler
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J. Derr: Townsend's Warbler
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J. Derr: Prairie Warbler
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J. Derr: Pine Warbler
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J. Derr: Yellow-rumped Warbler
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J. Derr: Louisiana Waterthrush
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J. Derr: Cerulean Warbler
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J. Derr: American Redstart
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J. Derr: Wilson's Warbler
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J. Derr: Wilson's Warbler
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J. Derr: Black and White Warbler
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J. Derr: Blue-winged Warbler
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J. Derr: Lawrence's Warbler
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J. Derr: Blackburnian Warbler
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J. Derr: Northern Waterthrush
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J. Derr: Magnolia Warbler
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J. Derr: Northern Parula
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J. Derr: American Redstart
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J. Derr: Tennessee Warbler
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J. Derr: Bay-breasted Warbler
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J. Derr: Blackpoll Warbler
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J. Derr: Blackburnian Warbler
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J. Derr: Ovenbird
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J. Derr: Yellow-breasted Chat
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J. Derr: Hooded Warbler
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J. Derr: Golden-winged Warbler
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J. Derr: Golden-winged Warbler
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J. Derr: Brewster's Warbler
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J. Derr: Blackpoll Warbler