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Vulnerable Animals

Vulnerable species are at risk of becoming extinct in the wild or extinct. The IUCN currently identifies over 10,000 species as vulnerable. For a species to be considered vulderable it must meet any of the following criteria:

  • Population Reduction

    • A taxon’s population size is reduced by 50 percent or more over 10 years or three generations, whichever is longer, and scientists understand that the reduction causes are reversible and have stopped. For example, let’s pretend there is a bird species that traditionally had a population of 2000. Over 10 years, it drops to 1000 because a logging company demolished its habitat. If lawmakers establish regulations that bar the logging company from continuing to fell trees in the area, then the IUCN will list the bird species as “endangered” because they understand the reason for the decline, and it is stopped.
    • A taxon’s population size is reduced by 30 percent or more over 10 years or three generations, whichever is longer. However, conservationists don’t understand the reduction cause or know if it is reversible. For example, let’s say there is a bird species that traditionally had a population size of 2000. Over 10 years, it drops to 1400. Scientists, however, can’t figure out why they’re dying off. In this case, the IUCN would list it as “endangered” because the decimation is evident, but it can’t figure out why.
    • A taxon’s population size is reduced by 30 percent or more over 10 years or three generations, whichever is longer, and the animal is also battling habitat shrinkage or another threat.
  • Geographic Reduction

    The area where a species can live is reduced to 20,000 square kilometers or less, or the area where it currently and actually occupies is reduced to 2,000 square kilometers, and at least two of the following criteria are also true:

    • The population is not known to exist at more than 10 locations.
    • Scientists observe or predict that the habitat in question will continue to shrink or be degraded, and there’s also a decline in subpopulations or the number of reproducing adults.
    • Scientists observe extreme fluctuations in the number of locations, subpopulations, or the number of reproducing adults.
  • Dangerously Low Number of Adults

    • A taxon’s population only has 10,000 or fewer adults left, and a 10 percent decline is anticipated within 10 years or three generations, whichever is longer. If none of the taxon’s subpopulations contain more than 1,000 adults, or all the adults live in one subpopulation.
    • Scientists observe extreme fluctuations in the number of mature adults in a taxon’s population.
  • Dangerously Low Overall Population Size

    • Only 1,000 or fewer individuals of a taxon remain.
    • A population with a viable but restricted habitat area is vulnerable to human activities within a very short period and thus may become critically endangered or extinct in the near future.
  • Expected Rapid Decline

    Research indicates that there’s a 10 percent or greater chance that the taxon will be extinct in the wild within 100 years

Aldabra Giant Tortoise (Geochelone gigantea)Aldabra Giant Tortoise
One got to be 255 years old!
Asian Palm Civet (Paradoxurus Hermaphroditus)Asian Palm Civet
It mainly eats mangos and coffee!
Banded Palm Civet (Hemigalus Derbyanus)Banded Palm Civet
Markings give it camouflage!
Binturong (Arctictis binturong)Binturong
Also known as the Asian Bearcat!
Cassowary (Casuarius)Cassowary
Can reach speeds of 30mph!
Cheetah (Acinonyx jubatus)Cheetah
The fastest land mammal in the world!
Clouded Leopard (Neofelis nebulosa)Clouded Leopard
Has canines that can be two inches long!
Crested Penguin (Eudyptes robustus)Crested Penguin
Has long yellow eyebrows!
Crocodile (Crocodylus acutus, Crocodylus intermedius, Crocodylus johnsoni, Crocodylus mindorensis, Crocodylus moreletii, Crocodylus niloticus, Crocodylus novaeguineae, Crocodylus palustris, Crocodylus porosus, Crocodylus rhombifer, Crocodylus siamensis, Osteolaemus tetraspis, Mecistops cataphractus)Crocodile
Have changed little in 200 million years!
Darwin's Frog (Rhinoderma Darwinii)Darwin's Frog
Camouflages itself as a dead leaf!
Dwarf Crocodile (Osteolaemus tetraspis)Dwarf Crocodile
Digs burrows in river banks to rest!
Giant Panda Bear (Ailuropoda melanoleuca)Giant Panda Bear
Bamboo makes up 99 per cent of their diet!
Great White Shark (Carcharodon carcharias)Great White Shark
Can grow to more than 8 meters long!
Hippopotamus (Hippopotamus amphibius)Hippopotamus
Has pink anti-bacterial sweat!
Humboldt Penguin (Spheniscus Humboldti)Humboldt Penguin
Found on the South American coast!
Komodo Dragon (Varanus komodoensis)Komodo Dragon
Only found on five Indonesian islands
Lion (Panthera leo)Lion
Lives in small groups called prides!
Malayan Civet (Viverra Tangalunga)Malayan Civet
Also known as the Oriental Civet!
Masked Palm Civet (Paguma Larvata)Masked Palm Civet
Found throughout Asia, India and China!
Polar Bear (Ursus maritimus)Polar Bear
Could be extinct within the next 30 years!
Quokka (Setonix brachyurus)Quokka
Makes runways through the long grasses!
Royal Penguin (Eudyptes Schlegeli)Royal Penguin
Can reach speeds of 20mph!
Sperm Whale (Physeter Macrocephalus)Sperm Whale
Each tooth weighs 1kg!
Sun Bear (Helarctos malayanus)Sun Bear
The smallest species of bear in the world!
Uakari (Cacajao)Uakari
Have a very short tail for their size!
Umbrellabird (Cephalopterus)Umbrellabird
Migrates up and down the mountains!