Oahu Palmcreeper (Ciridops sp.)  

This form is known only from subfossil remains collected at Barber’s Point on the island of O’ahu.  

The Oahu Palmcreeper probably reached a size of about 12 cm, it was quite like the Ulaaihawane (Ciridops anna (Dole)) from Hawai’i and Moloka’i, but was slightly smaller and had an even more plump body structure. [1]  

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References:  

[1] S. L. Olson; H. F. James: Descriptions of thirty-two new species of birds from the Hawaiian Islands: Part II. Passeriformes. Ornithological Monographs 45: 1-91. 1991  

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edited: 24.09.2017