This complete mint set of two large stamps, issued by Mexico on July 3, 1982, features sea turtles and Gray whales, along with a map of Mexico showing the common territories of these marine animals. $3.00 retail value (Scott 2007 Standard Postage Stamp Catalogue, Vol. 4).

This complete mint set of eight stamps, including one in a mini-sheet (souvenir sheet) format, was issued by Mongolia on October 29, 1991. Eight different lizards are depicted; their scientific names are inscribed on the stamps. The retail value of this set is $9.50 (Scott 2007 Standard Postage Stamp Catalogue, Vol. 4).

This complete mint set of five stamps, including a high denomination stamp in a souvenir sheet format, depicts wolves nursing young, snarling, eating a deer, etc. The scientific names of the wolves are inscribed on the stamps. Issued by Mongolia on January 17, 2000. The retail value of this set is $6.75 (Scott 2007 Standard Postage Stamp Catalogue, Vol. 4).

Featuring insects (beetles), this mint set of seven stamps was issued by Mongolia on May 22, 1991. The scientific names of the beetles are inscribed on the stamps. Please note that the lowest value stamp (lowest denomination) has had the gum removed from the back and has light paper wrinkles; we have therefore discounted our list price by over 35%. $4.25 retail value (Scott 2007 Standard Postage Stamp Catalogue, Vol. 4).

Issued by Mongolia on June 20, 1990, this complete mint set of seven stamps features a variety of marine mammals. The scientific names of the mammals are inscribed on the stamps. $4.25 retail value (Scott 2007 Standard Postage Stamp Catalogue, Vol. 4).

This complete mint set of four stamps features different views of the crane Grus vipio pallas. Issued by Mongolia on May 23, 1990. The retail value of this set is $2.40 (Scott 2007 Standard Postage Stamp Catalogue, Vol. 4).