Final answer:
The black rhino is more critically endangered today than it was in 1996. The Siberian tiger is also critically endangered, while the giant panda has shown improvements in its conservation status.
Step-by-step explanation:
Today, the black rhino is more critically endangered than it was in 1996. The IUCN Red List categorizes the black rhino as critically endangered, indicating that it faces an extremely high risk of extinction. The population of black rhinos has declined significantly due to poaching and habitat loss.
The Siberian tiger, also known as the Amur tiger, is considered critically endangered as well. Its population has been severely affected by hunting and habitat degradation.
On the other hand, the giant panda has shown improvements in its conservation status. It has been upgraded from endangered to vulnerable on the IUCN Red List. This is a positive trend, indicating that conservation efforts have been successful in protecting and restoring giant panda populations.