Home Crop Monitoring Tree-dwelling, coconut-cracking giant rat discovered in Solomon Islands

Tree-dwelling, coconut-cracking giant rat discovered in Solomon Islands


Bear in mind the film The Princess Bride, when the characters debate the existence of R.O.U.S.es (Rodents of Uncommon Measurement), solely to be beset by huge rats? That’s type of what occurred right here.

Mammalogist Tyrone Lavery heard rumors of a giant, possum-like rat that lived in timber and cracked open coconuts with its enamel on his first journey to the Solomon Islands in 2010.

After years of looking out and a race in opposition to deforestation destroying the rat’s would-be residence, Lavery, together with John Vendi and Hikuna Decide, lastly discovered it.

“The new species, Uromys vika, is pretty spectacular it’s a big, giant rat,” stated Lavery, a post-doctoral researcher at The Area Museum in Chicago and the lead creator of the Journal of Mammalogy paper saying the rat’s discovery. “It’s the first rat discovered in 80 years from Solomons, and it’s not like people haven’t been trying it was just so hard to find.”

The Solomon Islands, a rustic made up of a sequence of islands a thousand miles northeast of Australia, are biologically remoted. Over half of the mammals on the Solomon Islands are discovered nowhere else on Earth, making it a sexy location for scientists like Lavery.

“When I first met with the people from Vangunu Island in the Solomons, they told me about a rat native to the island that they called vika, which lived in the trees,” says Lavery. “I was excited because I had just started my Ph.D., and I’d read a lot of books about people who go on adventures and discover new species.”

However years of looking out didn’t flip up any of the giant rats. “I started to question if it really was a separate species, or if people were just calling regular black rats ‘vika,’”stated Lavery. A part of what made the search so troublesome was the rat’s tree-dwelling life-style.

“If you’re looking for something that lives on the ground, you’re only looking in two dimensions, left to right and forward and backward. If you’re looking for something that can live in 30-foot-tall trees, then there’s a whole new dimension that you need to search,” explains Lavery.

Lastly, one of many rats was discovered scurrying out of a felled tree. “As soon as I examined the specimen, I knew it was something different,” says Lavery. “There are only eight known species of native rat from the Solomon Islands, and looking at the features on its skull, I could rule out a bunch of species right away.”

After evaluating the specimen to comparable species in museum collections and checking the brand new rat’s DNA in opposition to the DNA of its family, Lavery confirmed that the giant rat was a brand new species, which he named Uromys vika in honor of the native identify for the rat.

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“This project really shows the importance of collaborations with local people,” says Lavery, who discovered concerning the rat by speaking with Vangunu locals and confirmed with them that the brand new rat matched the “vika” they knew.

Vika are so much greater than the black rats that unfold all through the world with European colonists — the rats you’ll see in American alleys weigh round 200 grams (0.44 kilos), Solomon Islands rats may be greater than 4 instances that measurement, weighing as much as a kilogram (2.2 kilos).

And from the tip of its nostril to the tip of its tail, U. vika is a few foot and a half lengthy. And whereas they haven’t but been noticed cracking open coconuts, they do have a penchant for chewing round holes into nuts to get on the meat.

The rat’s giant measurement and possum-like tree-dwelling life-style may be traced again to its island residence. Islands are stuffed with animals discovered nowhere else on earth that developed in isolation from the remainder of the world.

“Vika’s ancestors probably rafted to the island on vegetation, and once they got there, they evolved into this wonderfully new species, nothing like what they came from on the mainland,” explains Lavery.

Whereas the rat has solely simply been discovered, it’s going to rapidly be designated as Critically Endangered, as a result of its rarity and the risk posed by logging to its rainforest habitat. “It’s getting to the stage for this rat that, if we hadn’t discovered it now, it might never have gotten discovered.

The area where it was found is one of the only places left with forest that hasn’t been logged,” says Lavery. “It’s really urgent for us to be able to document this rat and find additional support for the Zaira Conservation Area on Vangunu where the rat lives.

“Lavery also emphasized the necessity of preserving the rats, not just for ecological reasons, but for the role they play in the lives of Vangunu’s people. “These animals are important parts of culture across Solomon Islands people have songs about them, and even children’s rhymes like our ‘This little piggy went to market.’

The discovery marks an important moment in the biological study of the Solomon Islands, especially since vika is so uncommon and close to extinction. “Finding a new mammal is really rare there are probably just a few dozen new mammals discovered every year,” says Lavery. “Vika was so hard to find, and the fact that I was able to persevere is something that I’m proud of.”


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