The National Bank of Belarus on September 20th, 2011 issued into circulation new silver and copper-nickel commemorative coins “Curlew” of the “Bird of the year” series:

Silver coin – face value 10 rubles, purity 925, weight 16.81 g, diameter 32 mm, mintage 2000 pcs., quality proof;
CuNi coin - face value 1 ruble, weight 13.16 g, diameter 32.00 mm, mintage 2000 pcs., quality proof-like;

Coins are round, the edge is reeded.

Coins are minted at The Mint of Poland

Source of information: National Bank of the Republic of Belarus www.nbrb.by