Pandanaris convexa is an extinct cowbird

Cowbird

Cowbirds are birds belonging to the genus Molothrus in the family Icteridae. They are brood parasitic New World birds which are unrelated to the Old World cuckoos, one of which, the Common Cuckoo, is the best-known brood parasitic bird....

 genus described in 1947 by Alden H. Miller.

Physiology

The Pandanaris convexa has an upper mandible similar to that of the Tangavius and Molothrus cowbird genii (7.0 mm in length), though its narial opening is approximately 30% larger. In addition, Miller found that the species' internarial bridge was entirely different from other cowbirds and blackbirds. The species has a distinct "even" curvature of its culmen that is not found in any other icterid

Icterid

The Icterids are a group of small to medium-sized, often colorful passerine birds restricted to the New World. Most species have black as a predominant plumage color, often enlivened by yellow, orange or red. The family is extremely varied in size, shape, behavior and coloration...

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