Soroavisaurus is a genus of enantiornithean birds related to Avisaurus.

The only known species, S. australis, is known from fossils collected from the Lecho Formation (Maastrichtian age) of Estancia El Brete, in the southern tip of the province of Salta, Argentina.

[3] PVL-4033, a tibiotarsus, probably belongs to a S. australis is also known, book published in 2019 estimated its length of 80 cm (31 in), hip height of 35 cm (14 in), and weight of 7.25 kg (16.0 lb), making it the largest enantiornithean.

[3] However according to Walker and Dyke (2009) which considered PVL-4033 as Martinavis sp., its tibiotarsus length is 85.6 mm (3.37 in),[4] much shorter than that of Lectavis (156 mm (6.1 in) tibiotarsus)[5] which the same book estimated a length of 41 cm (16 in), hip height of 30 cm (12 in), and weight of 1.15 kg (2.5 lb).

[3] The cladogram below is from Wang et al., 2022:[6] Cruralispennia Protopteryx Elsornis Flexomornis Iberomesornis Longirostravis Rapaxavis Sinornis Enantiornis Halimornis Concornis Neuquenornis Eoalulavis Liaoningornis Gobipteryx Hebeiornis Eocathayornis Qiliania Intiornis Soroavisaurus Avisaurus Gettyia Mirarce Feitianius Longusunguis Dunhuangia Musivavis Pengornis Yuanchuavis Eopengornis Parapengornis Grabauornis Parvavis Cratoavis Gretcheniao Huoshanornis Shengjingornis Zhouornis Bohaiornis Eoenantiornis Fortunguavis Mystiornis Shenqiornis Sulcavis Key to letters: b = Boluochia c = Cathayornis e = Enantiophoenix f = Houornis h = Longipteryx i = Parabohaiornis j = Pterygornis l = Vorona m = Yuanjiawaornis n = Yungavolucris Due to their large size and strong talons, Soroavisaurus could occupy the same ecological niche as extanct birds of prey, noticing prey from afar on the plains or in water.