#4740a Bulgaria - Worldwide Fund for Nature: Eurasian Wolf M/S (MNH)
2015 - Worldwide Fund for Nature, Miniature Sheet of 8, 2 blocks, #4737-4740. Designs: Canis lupus lupus (Eurasion Wolf): a, 65s, Adult and three pups. b, 80s, Wolf with head lowered. c, 1.40 l, Wolf with head raised. d, 3 l, Four wolves.