The UN has a continuing series of stamps up to the present day of 'Endangered Species'. Things are not getting better and if fact worse so sadly I don't think they will run out of subjects.
|2001: Endangered Species (9th Series)
Here are the Speckled Bear, the Laysan duck from the Hawaiian Islands which has been brought back from near extinction with interventions , the Aardwolf, an insectivorous mammal and the Silver Langur or Silver Leaf Monkey. All the FDC envelopes are the same but whereas the Vienna office always uses a double postmark the New York office does not, I don't know why
|1994: Endangered Species (2nd Series)
|1995: Endangered Species (3rd Series)
Sunday Stamps II theme this week is - Endangered Species - See It On A Postcard