[4] Between 1946 and 1954 Laura Kaufman crossed the Green-legged Partridge breed with American Plymouth Rock birds to create the Polbar.

[4] The ZK strain has since 1945 been kept at Felin near Lublin, in the eastern part of the country, by the University of Life Sciences of that city.

[2] The Z11 strain was kept at Życzyn from 1972 until 1995, when it was moved to the National Research Institute of Animal Production [pl] experimental station in Chorzelów.

[2] It is not suited to intensive management, and becomes subject to cannibalism, feather loss and feather-pulling if kept closely enclosed.

[4] Egg-laying performance is generally poor;[4] the yolk of the eggs has a low cholesterol content compared to that found in other breeds.