- Source: Jamna (bird)
Jamna (Polish: Jamna, Polish pronunciation: [ˈjam.na]) is an extinct passeriform bird from early Oligocene deposits of Poland. It has been concluded as a frugivore or omnivore that lived in forests and shrubs. A 2024 study found it to represent a basal passeriform with no close relatives, being the sister group to all other extant passeriforms.