WWF cover from Russia

At the end of March 2008 I received this great letter from Ufa, the capital of Republic of Bashkortostan, in the western Urals area. It features the complete series of the Russian WWF stamps issued in 2007 with Bison bonasus (European bison), Uncia uncia (snow leopard) and Ciconia boyciana (Oriental stork), print-run 230,000 each. The set is complemented by two definitives: Pavlovsk from 2002 (4 rubles) and a coat-of-arms from 1998 (0.50 rubles). Thank you B. for this one!