Aiolornis incredibilis (syn Teratornis incredibilis), of the teratorn family, was the largest-known North American flight-capable bird, with a wingspan of up to approximately 5 m (16 ft) and a huge, deep, powerful bill. The typical body mass of this bird was estimated to be 23 kg (51 lb).

A partial humerus (wing bone) of an extinct Incredible Teratorn, the largest bird of flight ever identified from North America, has been discovered by San Bernardino County Museum paleontologists from two million-year-old deposits near Murrieta, Riverside County, California. The find has resulted in a new name for the extinct avian giant: Aiolornis incredibilis, "the incredible bird god of the winds.

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https://en.m.wikipedia.org/wiki/Aiolornis