Flag of Wallachia (cca. 1593 - 1611). This model was composed by Romanian heraldist Dan Cernovodeanu, after two (almost) identical contemporary descriptions of the flag of en:Michael the Brave (1593 - 1601) and en:Radu Şerban (1602 - 1611):
The flag is from white damascus on which is depicted a raven [sic!] with a red double cross and a red star in his berk, standing over a green juniper. (Ciro Spontoni, Historia della Transilvania, Venice, 1638)

The bird is a combination between aquila and raven, as it appears on contemporary seals.
self made after Magazin istoric nr 6/1970 and Magazin istoric nr 7/1975
Alex:D