First cover from Argentina - and a fantastic one!

My first cover from Argentina is what I call a direct hit! A clean cover, franked with 5 (!!) WWF stamps and cancelled with a very nice 'filatelia' postmark... Thank you very much Gabriel for a new masterpiece in my WWF collection!

This set was issued in 2002 and pictures these animals (left to right, top row first):

1. Pampas deer (Ozotoceros bezoarticus)
   (http://animaldiversity.ummz.umich.edu/site/accounts/information/Ozotoceros_bezoarticus.html)
   
   
2. Vicugna (Vicugna vicugna)
   (http://animaldiversity.ummz.umich.edu/site/accounts/information/Vicugna_vicugna.html)
   
   
3. Southern puda (Puda puda)
   (http://animaldiversity.ummz.umich.edu/site/accounts/information/Pudu_puda.html)
   
   
4. Chacoan peccary (Catagonus wagneri)
   (http://animaldiversity.ummz.umich.edu/site/accounts/information/Catagonus_wagneri.html)