U.S.A. (1957) Whooping crane. Maximum card with First Day cancel. Scott No 1098, Yvert No 612b.
$3
NIGER (1977) Reclamation of Sahel*. Imperforate. Scott No 405, Yvert No 410.
$5
CAMEROUN (1978) Sahel greening*. Set of 2 imperforates. Scott Nos 647-8, Yvert Nos 627-8.
$8
U.S.A. (1981) Preservation of habitats. Set of 4 maximum cards with First Day cancel. Scott Nos 1921-4, Yvert Nos 1340-3.
$12
LIECHTENSTEIN (1983) Protection of shores & coasts*. Maximum card. Scott No 762, Yvert No 765.
$5
GREAT BRITAIN (1986) Nature conservation - species at risk. FDC with cachet and special cancel. Scott Nos 1141-4.
$10
LIECHTENSTEIN (1988) Land conservation*. Set of 3 maximum cards. Scott Nos 882-4, Yvert Nos 880-2.
$10
RUSSIA (1990) Nature conservation. FDC of S/S with full-envelope cachet and special cancel. Scott No B172.
$10
AUSTRALIA (1992) Farm planning*. Maximum card with thematic First Day cancel. Scott No 1267b.
$3
AUSTRALIA (1992) Dune care*. Maximum card with thematic First Day cancel. Scott No 1267e.
$3
SENEGAL (1994) Conservation of Seashore*. Set of 4 imperforates. Scott Nos 1075-8, Yvert Nos 1061-4.
$20
HUNGARY (1979) Various animals*. Wildlife protection*. Set of 6 imperforates. Scott Nos2611-6.
JAPON (1976) Ryukyu-Yamagame tortoise*. Yvert No 1181. Scott No 1203. Protection de la nature. Surchargé "MIHON" (Spécimen). **.
FRANCE (1972) Salmon*. Philatelic First Day document with special engraving thematically related to the stamp and printed description and explanation of the stamp on the reverse. Nature protection issue. Scott No 1338, Yvert No 1693.
HUNGARY (1979) Sturgeons*. Map of Danube*. Imperforate. Scott No 2599.
NEW CALEDONIA (1986) Various flowers*. Imperforate. Scott No 549, Yvert No 527. Nature protection.
ETATS UNIS (1943) Voilier* au lac. Empreinte rouge de machine à affranchir sur pli Pitney Bowes No 93398: "Aidez-nous à améliorer la beauté de Chicago. Ne laissez pas de détritus dans les parcs."