Briefmarken Jahr 1981

Ramphastos Sulfuratus
Carlos Rosales Varderi
Dryocopus Lineatus
Carlos Rosales Varderi
Pterolebias Longipinnis
Carlos Rosales Varderi
Austrolebias Nigripinnis
Carlos Rosales Varderi
Corydoras Arcuatus
Carlos Rosales Varderi
Anostomus Anostomus
Carlos Rosales Varderi
Poecilia reticulata
Carlos Rosales Varderi
Cheirodon Axelrodi
Carlos Rosales Varderi
Nymphaea B.G.Berry
Carlos Rosales Varderi
Nymphaea Lotus
Carlos Rosales Varderi