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  1. Birds of a Canadian Peat Bog
    By: Eifrig, C W G
    Type: Article
    In: The Wilson Bulletin
    Volume: 23
    Issue: 2
    Date: 1911
    Page Range: 119--125
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  2. Concealing Posture of Grebes
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 32
    Date: 1915
    Page Range: 95--96
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  3. Cory's Least Bittern in Illinois
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 32
    Date: 1915
    Page Range: 98--100
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  4. In the Haunts of Cairns' Warbler
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 37
    Date: 1920
    Page Range: 551--558
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  5. A Mild Winter and Its Effects on the Migration of Birds at Chicago
    By: Eifrig, C W G
    Type: Article
    In: The Wilson Bulletin
    Volume: 34
    Issue: 2
    Date: 1922
    Page Range: 90--94
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  6. Notes on Birds of the Chicago Area and Its Immediate Vicinity
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 36
    Date: 1919
    Page Range: 513--524
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  7. Notes on Some Birds of the Maryland Alleghanies; An Anomaly in the Check-List
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 32
    Date: 1915
    Page Range: 108--110
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  8. Notes on Some Northern Birds
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 23
    Date: 1906
    Page Range: 313--318
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  9. A One-Legged Crow (Corvus brachyrhynchos)
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 22
    Date: 1905
    Page Range: 312--313
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  10. Ornithological Results of the Canadian 'Neptune' Expedition to Hudson Bay and Northward. 1903-1904
    By: Eifrig, C W G
    Type: Article
    In: The Auk
    Volume: 22
    Date: 1905
    Page Range: 233--241
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  11. An Unintentional Bird Preserve
    By: Eifrig, C W G
    Type: Article
    In: The Wilson Bulletin
    Volume: 27
    Issue: 4
    Date: 1915
    Page Range: 458--460
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