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Island Extinctions

Islands tend to be uniquely susceptable to human extinctions, due to small habitat sizes, and limited natural predators. Given an extinction date and hint, list each animal formerly associated with islands
This includes species that were previously found on a mainland and survived in an island refuuge
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Kearsarge
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Last updated: October 24, 2025
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First submittedMarch 8, 2025
Times taken140
Average score23.5%
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Hint
Date
Answer
Family of ground sloths native to the Greater Antilles, the last surviving ground sloths after the Pleistocene extinctions
~3000 BCE
Megalocnids
Goatlike animal with forward-facing eyes/binocular vision native to Balaeric Islands of Spain
~2500 BCE
Myotragus
Wrangel Island in Siberia was the last refuge of this iconic Ice Age pachyderm
~2000 BCE
Woolly Mammoth
Lizardlike terrestrial, possibly tree-climbing crocodilian native to Melanesia
~1000 BCE
Mekosuchus
~300 lb horned turtle with a spiked tail, best known from Pleistocene Lord Howe Island in Australia, survived well into the Holocene on the island of New Caledonia
~300
Meiolania
Massive gooselike ducks formerly native to the Hawaiian islands
~1000
Moa-nalu
Giant bird species native to Madagascar known for laying the largest eggs of any animal
~1050
Elephant Bird
Giant flightless birds native to New Zealand
~1450
Moa
Giant eagle native to New Zealand that specialized in hunting giant flightless birds
~1450
Haasts Eagle
Hint
Date
Answer
Family of giant primates native to Madagascar. The largest species was the size of a gorilla
~1500
Sloth Lemurs
The largest pigeon species, a massive, flightless bird native to the island of Mauritius
~1662
Dodo
Another species of giant flightless pigeon, native to the island of Rodrigues near Mauritius
~1750
Solitaire
This North Pacific manatee/dugong relative died out within 20 years of European arrival in the remote Commander Islands of Russia
~1768
Stellers Sea Cow
The last outpost of this large, flightless species of seabird was the islet of Eldey in Iceland
1844
Great Auk
Doglike marsupial species historically associated with the island of Tasmania
1936
Thylacine
Songbird native to the Hawaiian island of Kaua'i, known for haunting calls captured in audio
1987
Kaua'i O'o
The last induvidual, Lonesome George, lived for 40 years after scientists were unable to find any other living members of the species.
2012
Pinta Island Tortoise
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4 Comments
+1
Level 68
Mar 8, 2025
Tried to select for the most "interesting" island animals that died out during the last 10,000 years, regardless of how well known they are. The fauna of New Caledonia and Melanesia as a whole is fairly obscure despite having interesting things like fully terrestrial crocodiles and wannabe-ankylosaur land turtles. That said, well known island fauna like Dodos, a particularly famous species of galapagos giant tortoise get a spot.

Generally tried to avoid animals where the extinction date is unclear, or might still exist. The only exceptions for this is: 1. the Thylacine, which is unusual enough to really deserve a spot here. Personally I think the chances of it still existing are pretty low, I consider most sightings to be similar to bigfoot or Loch Ness Monster sightings, more a cultural meme than real animals. 2. the Pinta Island Tortoise, which still exists in hybrids even if purebred members of the species died with Lonesome George. In that case I decided that hybrids do not count

+1
Level 62
Oct 21, 2025
My performance on this quiz mega suckus
+1
Level 89
Oct 21, 2025
Not a lot of "living in harmony with nature" in those answers.
+1
Level 97
Oct 22, 2025
Accept Tasmanian Tiger for Thylacine?