This 20 stotinki stamp from the People’s Republic of Bulgaria, issued in 1961, depicts a beautifully stylized European otter (Lutra lutra) diving gracefully underwater with a fish in its mouth. The minimalist design, in deep brown on a pale blue background, emphasizes motion and elegance. Part of a definitive series featuring native Bulgarian fauna, this issue highlights the country’s rich wildlife and artistic approach to natural themes during the socialist period. A favorite among collectors of animal and Eastern European wildlife stamps.