This is one of two passerine bird species recently found in middle Miocene deposits in Austria, this one is known from a partial skull and several other quite shredded bones while the second one is known only from a sternum.
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References:
[1] Johannes Happ; Armin Elsler; Jürgen Kriwet; Cathrin Pfaff; Zbigniew M. Bochenski: Two passeriform birds (Aves: Passeriformes) from the Middle Miocene of Austria. PalZ (2021). https://doi.org/10.1007/s12542-021-00579-2