i am not sure
The Northern quoll is more than Threatened. It has a national listing of Endangered, and a Northern Territory listing of Critically Endangered.
It is the premier listing of species that are threatened under various levels of threat. Listings are: Least Concern Near Threatened Vulnerable Threatened Endangered Critically Endangered Extinct in wild Extinct
Yes, polar bears are listed as Threatened on the main endangered species lists. See the related question below for more information about their listing and status.
Listing
The jaguar was listed on the endangered species list on March 28, 1972. The jaguar is the largest and most powerful wild cat in the Western hemisphere. An adult male jaguar may be four to seven feet long, excluding the long tail.
Platypuses do not have an official listing of "endangered", so the answer to the question has to be 'no'. However, they are threatened by pollution, as are all members of the animal kingdom in one form or another. Unlike sea animals, platypuses do not ingest plastic bags and floating rubbish, but they are sensitive to chemical changes in the water in which they feed.
There are 18 different subspecies of Penguins listed on the IUCN Red List. They range in status from "Least Concern" without a population trend listing to, "Endangered" with a population trend of "decreasing". The US Fish and Wildlife Service Endangered Species List has eight subspecies listed, as well, in various levels of the listing process, including a listing of "Endangered". For more details, please see sites listed below.
There are 8 species of rattlesnakes in the United States that are listed as either a "species for concern," "threatened," or are a "candidate" for listing on the U.S. Fish & Wildlife Services Species Reports. However, there are no rattlesnakes listed as endangered at this time.
A species is usually considered threatened as it is becoming endangered, that is if it doesn't meet the requirments for endangered from the time of it's first study, or they might be considered endangered before a Listing is enacted or developed. As with the Humpback Whale, they were already considered endangered before the Endangered Species Act of 1973 was enacted.Some of the lists have different listings and levels for species. IUCN and CITES are both different from the Endangered Species List.Most endangered species are endangered because we are killing them for there teeth, skin and bones or there habitat is being destroyed or there isn't enough food for them.
The Great Barrier Reef does not yet have an official listing of "endangered". However, around 40 species which live in and around the Great Barrier Reef are listed as endangered.
Disney
The Endangered Species Act (ESA) is a U.S. law aimed at protecting and recovering imperiled species and the ecosystems upon which they depend. One key provision of the ESA is the listing of species as either endangered or threatened, which triggers protections such as prohibiting the "take" (harm, harass, or kill) of listed species and restricting federal agency actions that may jeopardize their existence. The act also mandates the development of recovery plans for these species to promote their survival and restoration.