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Creature 
Fast Facts

Introducing you to extinct species.

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THE IXODES

NITENS TICK

1. The Christmas Island tick, Ixodes nitens, lived exclusively on the Maclear’s rat that “swarmed across Christmas Island. 2. The “Christmas Island tick”, though not officially given a common name, is one of the first host specific parasites to go extinct. 3. The loss of a parasite with its host has been dubbed the “cryptic loss effect”. 4. Most parasites do not harm their host and actually help build the host’s immunity. Because the Christmas Island flea went extinct over 100 years ago, there is no evidence whether it harmed the Maclear’s rats or not. 5. Tapeworms, fleas, and botflies are parasites that are being studied in the medical world for their abilities to store heavy metals, stop blood clotting, and numb pain. 6. Black rats brought diseases to Christmas Island, killing off large numbers of native Maclear's rats and bulldog rats. 7. When Maclear’s rat went extinct, so did the two parasites that relied on it for survival, the Christmas Island flea, Xenopsylla nesiotes, and the Ixodes nitens, a species of hard tick.

Extinction 
Cometh

Facing the light at the end of the tunnel

EXTINCTION DATE

1903

 

Christmas Island was named by William Mynors on Christmas Day 1643. The British’s first attempt to make a settlement on Christmas Island in 1857 failed. It wasn’t until 1886 that John Maclear discovered Flying Fish Cove, that a settlement began to take hold. Maclear took scientific notes about the plants and animals on Christmas Island. Unfortunately, it is believed that Maclear’s ship, Challenger, inadvertently brought invasive black rats to the island with him. These black rats would have devastating effects on Christmas Island’s two native rat species, the bulldog rat and the Maclear’s rat. Both native rat species were last seen in 1903. It is thought that a combination of factors, diseases, competition, and crossbreeding led to the extinction of the bulldog rat and the Maclear’s rat. The Maclear’s rat had no fear of humans and seemed perfectly adapted to feeding on the land-dwelling red crabs. In fact, some scientists believe that Maclear’s rats helped to control the red crab population on the island. Like many island bound species, the Maclear rats were vulnerable to outside species and the diseases they carried. Although Jurassic Park is fiction, scientists are working on several de-extinction projects. In fact, in 2003 scientists did bring back the extinct Pyrenean ibex, a type of wild goat, for 7 minutes before it died, showing de-extinction is possible. While the Maclear’s rat might be a candidate, there are no specimens of the “Christmas Island tick” preserved to study. In 2022 at the University of Copenhagen Tom Gilbert is leading a team to use the genes from the closely related Norway brown rat, to resurrect Maclear’s rat. The two species share 95% of the same genes. Even if the Maclear’s rat is resurrected from extinction, its tick will not return. The Australian government has been working on initiatives to protect its native wildlife by restoring lost habitat and eliminating invasive species which have plagued the continent and surrounding island territories. Feral cats, crazy yellow ants, wolf snakes, and giant centipedes are just a few of the non-native species that have led to the extinction of so many animals. Australia has set up a Threatened Species Commissioner and federal environment minister to study these problems and look for solutions to save species currently at risk. Some people are trying to get Christmas Island to be labeled ‘World Heritage Site” to bring more public attention to the problems there. An island biodiversity monitoring program has been set up in Christmas Island as well. If the Christmas Island tick was brought back to life, could it ever be reintroduced to its native homeland in Christmas Island?

Lazarus
Tales

Short stories of return

COMING
SOON

The Christmas Island tick's Lazarus tale has yet to be written, but what adventures will await it when it returns to Christmas Island northwest of Australia? Stay tuned to find out.

More to Explore
All answers lead to more questions

The Ixodes nitens, is an extinct hard tick species that went extinct with its host the Maclear's rat in 1903
Image of a similar ixodes species from Wikipedia



 

The Christmas Island flea, Xenopsylla nesiotes, went extinct with its host the Maclear's rat in 1903
Image of a similar flea species from The Revelator

 

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A monograph from 1887 of Maclear's rat
drawn by Joseph Smit (1887-1924)
Image from Wikipedia

 A monograph by Charles William Andrews from 1900 of the bulldog rat and Maclear's rat skulls and teeth Christmas Island
Image from Wikipedia

 An extinction timeline for the Maclear's rat created by 
Patricia Wynne
Image from Wikipedia

 One of six Maclear's rat skins that are preserved at the Life Collections of the Oxford University Museum of Natural History
Image from More Than a Dodo

Map of Christmas Island with its flag
Image from Welt Atlas

Christmas Island location & famous red crabs
Image from US Sun

A Christmas Island postcard showing facts, cultural, history, & native wildlife
Image from Postcards Market

A photo of Gump, the last Christmas Island forest skink, that died on May 31, 2014.
Image from The Conversation

A photo of a Christmas Island forest skink
Image from The Conversation

A stamp showing the critically endangered, possibly extinct Christmas Island shrew
Image from World Wildlife Fund

The Christmas Island Lister's gecko is now extinct in the wild, but being saved by captive breeding
Image from IUCN on X

The Christmas Island blue-tailed skink is now extinct in the wild, but being saved by captive breeding
Image from ABC

The red crab migration is what makes Christmas Island well known
Image from 9 News Australia

The invasive wolf snake had a direct impact on the lizards of Christmas Island
Image from Reptiles of Australia

Crazy yellow ants are an invasive species that has decimated the wildlife of Christmas Island
Image from 9 News Australia

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