Barnacle goose were of the same nature as other birds. The question of the nature of barnacle geese also came up as a matter of Jewish dietary law in the Halakha, and Rabbeinu Tam (1100–71) determined that they were kosher (even if born of trees) and should be slaughtered following the normal prescriptions for birds. The mythical barnacle tree, believed in the Middle Ages to have barnacles that opened to reveal geese, may have a similar origin to the other legends already mentioned. Barnacle goose The barnacle goose ("Branta leucopsis") belongs to the genus "Branta" of black geese, which contains species with
Green pygmy goose Green pygmy goose The green pygmy goose ("Nettapus pulchellus") is a small perching duck which breeds in southern New Guinea and northern Australia. First described in 1842 by the ornithologist John Gould, its specific name is derived from diminutive of the Latin adjective "pulcher" "pretty". It is one of three species in the Afro-Asian genus "Nettapus", an ancient and unusual group of ducks. No subspecies are recognised. Ranging from in length, it is one of the smallest species of duck. It has a wingspan. It has a small bill and compact form. The breeding male has a predominantly dark green