Montserrat Macaw (Ara sp.)
The Montserrat Macaw is known from a nearly complete coracoid that had been recovered from the Trants archaeological site on the island of Montserrat and appears to have been indeed a distinct, yet undescribed species.
The species was nearly the same size as the Chestnut-fronted Macaw (Ara severus (L.)), that is about 50 cm. [1]
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References:
[1] Charles A. Woods; Florence E. Sergile: Biogeography of the West Indies: Patterns and Perspectives, Second Edition. CRC Press; Auflage: Subsequent 2001
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edited: 06.09.2019