Name: Calciavis.
Phonetic: Cal-ve-a-vis.
Named By: Sterling L.‭ ‬Nesbitt‭ & ‬Julia A.‭ ‬Clarke‭ ‬-‭ ‬2016.
Classification: Chordata,‭ ‬Aves,‭ ‬Neornithes,‭ ‬Paleognathae,‭ ‬Lithornithiformes,‭ ‬Lithornithidae.
Species: C.‭ ‬grandei‭ (‬type‭)‬.
Diet: Uncertain.
Size: Unavailable.
Known locations: USA,‭ ‬Wyoming‭ ‬-‭ ‬Green River Formation.
Time period: Eocene.
Fossil representation: Almost complete,‭ ‬including soft tissue impressions of skin and feathers.

       Calciavis is a genus of bird that lived in North America during the Eocene.‭ ‬Calciavis likely foraged upon the ground,‭ ‬though the precise diet is still unknown at the time of writing.

Further reading
-‭ ‬The anatomy and taxonomy of the exquisitely preserved Green River Formation‭ (‬early Eocene‭) ‬lithornithids‭ (‬Aves‭) ‬and the relationships of Lithornithidae.‭ ‬-‭ ‬Bulletin of the American Museum of Natural History,‭ ‬no.‭ ‬406.‭ ‬-‭ ‬Sterling L.‭ ‬Nesbitt‭ & ‬Julia A.‭ ‬Clarke‭ ‬-‭ ‬2016.
- Estimating Flight Style of Early Eocene Stem Palaeognath Bird Calciavis grandei (Lithornithidae). - The Anatomical Record. - Christopher R. Torres, Mark A.Norell & Julia A. Clarke - 2019.


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