Endangered Species On WWF Stamps

Hispaniolan solenodon (Solenodon paradoxus), known as Agouta, issued by the Dominican Republic on March 15, 1994:

Endangered frogs, issued by Vietnam in 1991:

Yellow-banded poison dart frog (Dendrobates leucomelas)
Edible frog (Rana esculenta)
Golden mantella (Mantella aurantiaca)
Tree frog (Hyla halowelli)

Sun Bear (Ursus malayanus), issued by Laos on August 23, 1994:

Argentina WWF stamps on commercial cover, issued on July 27, 2002:

- Pampas deer (Ozotoceros bezoarticus)
- Vicugna (Vicugna vicugna)
- Southern Pudu (Pudu pudu)
- Chacoan Peccary (Catagonus wagneri)

Two commercial covers franked with the Red Colobus stamp issued by Uganda on September 26, 1977:

Stamps of USSR from 1975 overprinted with WWF logo and South American monkeys from Zhytomyr zoological park, Ukraine. As far as I know, these overprinted stamps, printed in 1990's, are illegal. During these years, many USSR stamps were overprinted by private companies with hundredths of different subjects to sell them to collectors. I keep them in my monkeys on stamps collection as a gimmick.

The 50th anniversary of WWF, a set of 10 endangered species stamps, issued by Great Britain on March 22, 2011:

Issued in two strips of five stamps each:

Fishing Cat (Prionailurus viverrinus), issued by Vietnam on August 1, 2010;

CHILE -1985
WWF Endangered Species.
Sea Wolf of Juan Fernández Islands
Huemul (Patagonia Deer)
Chinchilla
Blue Whale

Temminck's red colobus monkey (Piliocolobus temminckii) is an endangered primate native to West Africa. This set of stamps was issued by the Gambia on November 14, 2016. To the best of my knowledge, this issue completes the full series of WWF monkey stamps, all of which have now been presented in this thread.

okapi (Okapia johnstoni), designed by the talented Belgian designer André Buzin and issued by Zaire (Congo DR) on October 15, 1984.

Harpy Eagle (Harpia harpyja), WWF stamps issued by Guyana on January 23, 1990.

European Lotter (Lutra lutra), issued by DDR on July 7, 1987.

Prince Philip, Duke of Edinburgh (1921–2021), was a dedicated advocate for wildlife conservation and environmental protection. He served as President of the World Wildlife Fund (WWF) in the United Kingdom from 1961 to 1982 and as President of WWF International from 1981 to 1996. Throughout his life, he promoted the conservation of endangered species, the protection of natural habitats, and the sustainable use of natural resources. Prince Philip was among the earliest prominent public figures to raise awareness of environmental threats, emphasizing humanity's responsibility to protect nature for future generations.

Prince Philip and endangered animals, issued by Palau in 1999 in a sheet about "Environmental heroes of the 20th century".