The Red-breasted Goose (Branta ruficollis) is a brightly marked, endangered species of goose in the genus Branta from Eurasia.
All the species of the Branta genus are distinguished by their dark sooty colour, relieved by white, and as a distinction from the grey geese of the genus Anser. Among the species from these two genera, the Red-breasted Goose is the smallest at 53–56 centimetres (21–22 in) in length.This brightly marked species is unmistakable, but can be surprisingly difficult to find amongst Brent Geese. At long distances, the red of the breast tends to look dark, and the broad white stripe on the flank is more evidentThe Red-breasted Goose breeds in Arctic Siberia, mainly on the Taymyr Peninsula, with smaller populations in the Gydan and Yamal peninsulas. Most winter along the northwestern shores of the Black Sea in Bulgaria, Romania and Ukraine (occasionally moving further southwest to Greece), but some winter in Azerbaijan. It is a rare vagrant to Great Britain and other western European areas, where it is sometimes found with flocks of Brent or Barnacle Geese. However, since it is common in captive wildfowl collections, escapees outside its usual range are fairly frequent.
wintering in the Danube Delta, not difficult to see.