Medium Maui Rail (Zapornia sp.)  

The Medium Maui Rail is so far known from the subfossil remains of probably only two individuals, one was found in the Pu’u Naio Cave, the other one in the Lower Waihoi Valley Cave, together with the remains of the larger Severn’s Rail (Zapornia severnsi (Olson & James)).  

The species was about the size of the Hawaiian Rail (Zapornia sandwicensis (Gmelin)). [1]  

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References:  

[1] Storrs L. Olson & Helen F. James: Descriptions of thirty-two new species of birds from the Hawaiian Islands: Part I. Non-Passeriformes. In: Ornithological Monographs 45. 1991  

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edited: 20.03.2018