There are several good international lists. The International Union of Conservation for Nature, also known as the IUCN Red List. The Convention on International Trade in Endangered Species, or CITES....
Whenthe breeds numbers get low, for examplethis isn't real, just an example1987 resultsPandas : 10 million2002 resultsPandas : 60,000.The Pandas are going extinct and the numbers are lowering,...