Betta fish
Betta splendens IUCN Red List category
Vulnerable
Animals the IUCN Red List classes as Vulnerable, and what is known about their numbers.
13 animals43 articles
Animals: Vulnerable
Betta fish
Betta splendens 
Cheetah
Acinonyx jubatus 
Giraffe
Giraffa camelopardalis 
Great white shark
Carcharodon carcharias 
Hippopotamus
Hippopotamus amphibius 
King cobra
Ophiophagus hannah 
Leatherback sea turtle
Dermochelys coriacea 
Lion
Panthera leo 
Polar bear
Ursus maritimus 
Pygmy marmoset
Cebuella pygmaea 
Snow leopard
Panthera uncia 
Sulcata tortoise
Centrochelys sulcata 
Walrus
Odobenus rosmarus Articles
Comparisons
How big is a lion? Size and weight compared with a tiger and a human
A male lion weighs 150 to 260 kg and stands about 1.2 m at the shoulder. See how lions measure…
Adaptations
Snow leopard adaptations, and how scientists came to know the “ghost of the mountains”
Snow leopards survive the high mountains of Asia with a huge tail, furry snowshoe paws and a big warming nose.…
Speed
How fast can a cheetah run?
The fastest cheetah ever tracked in the wild hit 93 km/h (58 mph). Here is how scientists measured it, why…
Behaviour
Will a lion eat another lion?
Lions kill other lions fairly often, mostly cubs after new males take over a pride, but they rarely eat them.…
Senses
How far can a lion smell? (Lion vs dog vs bear)
Nobody has measured how far a lion can smell. Here is what lions really use their noses for, and how…
Predators & threats
What eats lions?
Nothing regularly hunts a healthy adult lion. People and other lions cause most lion deaths, while cubs are taken by…
Records & rankings
What is the biggest bear in the world?
The polar bear and the Kodiak brown bear tie as the world's biggest bears. An extinct South American bear, Arctotherium,…
Size & weight
How Big Do Sulcata Tortoises Get: A Comprehensive Guide
Have you ever heard of the Sulcata tortoise? It’s a big tortoise that lives in dry parts of Africa. Just…
Adaptations
What are the adaptations of a great white shark?
The 3 key adaptations of a great white shark, sorted into structural, behavioural and physiological, with a labelled diagram, myths,…
Strength & bite force
How strong is a polar bear?
Polar bears are extremely strong, but their bite, swipe and lift have never been measured. Their size, paws, skull and…
Conservation & population
Grizzly polar bear hybrids: are pizzly bears real?
Grizzly polar bear hybrids are real but very rare. All eight known wild pizzlies trace back to one female polar…
Diet & feeding
What do walruses eat?
Walruses eat mostly clams and other seafloor shellfish, thousands in one feeding. They find them with their whiskers and suck…