No,in Red Data Book,they are two seperate categories.
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Critically endangered animals are in a more severe situation compared to vulnerable and endangered animals. Critically endangered status signifies a higher risk of extinction, with very few individuals remaining in the wild. Efforts to save critically endangered species are typically more urgent and intensive.
Five categories of risk species include extinct, extinct in the wild, critically endangered, endangered and vulnerable.
The African lion has been considered vulnerable since 1996, with their populations facing significant decline due to habitat loss, prey depletion, and human-wildlife conflict. The current status of the African lion is still a concern for conservationists.
If a species is listed as vulnerable, it means that it is facing a high risk of endangerment in the wild. This status indicates that the species is likely to become endangered if the threats to its survival are not addressed. Conservation efforts are typically needed to prevent these species from declining further.
An adult male polar bear weighs around 350-680kg, while a female weighs about 175-340kg.Tigers usuakky weigh only 300kg at most.So in general, the Polar bear is bigger than the tiger.