However , in 2004 the IUCN Red List of Threatened Species included nearly 2,000 endangered nonmarine molluscs .
There is also a shortage of specialists who can identify all the animals in any one area to species .
In 2004 the IUCN Red List of Threatened Species included nearly 2,000 endangered nonmarine molluscs .
There is also a shortage of specialists who can identify all the animals in any one area to species .