New species of Pleistocene stork found on 'hobbit' island

Dec 08, 2010 by Lin Edwards report
Marabou Stork (Leptoptilos crumeniferus) in the Oregon Zoo. Image: Wikipedia.

(PhysOrg.com) -- Fossils of a giant Pleistocene stork found on Flores island, Indonesia, belong to a new species according to scientists. The now extinct bird was probably flightless, and lived on the same island as Homo floresiensis, a small hominin species that has come to be nicknamed the "hobbit".

The fragments of were found by Dr. Hanneke Meijer of the Smithsonian National Museum of Natural History in Washington DC and her colleague Rokus Due of the National Center for Archaeology in Jakarta, Indonesia. Dr. Meijer is a paleontologist specializing in fossils of birds found on islands. The giant stork fossils were located in sediments dated at 20-50,000 years old in the Liang Bua cave in which H.floresiensis was found in 2004.

Dr. Meijer said bird fossils are distributed throughout the sediments found in the cave and and provide a unique opportunity to study how birds evolved in an insular environment, including their increasing size and loss of flight. Fossils of other giant species have also been found, including giant rats and lizards, but the island was also home to pygmy elephants as well as the hobbits.

In this undated sketch by Inge van Noortwijk and released by John Wiley & Sons, a six-foot (180 centimeters)-tall giant stork stands next to a dwarf Homo floresiensis that had lived on the remote island of Flores in Indonesia. According to the December 2010 issue of the Zoological Journal of the Linnean Society, fossils of the giant stork, which lived 20,000 to 50,000 years ago, have been discovered on the far-flung Indonesian island that has been home to many extreme-sized creatures, from tiny human-like "hobbits" and dwarf elephants to the world's largest-known rats and lizards. Picture: John Wiley & Sons, Inge van Noortwijk

The extinct marabou stork, Leptoptilos robustus, was around 1.8 meters long and weighed about 16 kg, which makes it larger than modern stork species. It was probably capable of preying on juvenile hobbits, since the adult hobbits were only about one meter tall, but there is no evidence that it did. Modern marabou storks feed mostly on carrion meat but they also eat small mammals, birds, fish and frogs.

Dr. Meijer said it is not unusual to find large birds on islands, especially if prey species are plentiful and mammalian predator species are scarce, but she said she had not expected to find a giant marabou stork on Flores. The size and weight of the bones suggest the stork was probably too heavy to fly, but it probably evolved from ancestors that flew to the isolated island and colonized it.

Dr. Meijer said the island has always been isolated from other islands in the region and has never been connected to the mainland. She said the isolation had played an important role in shaping the evolution of the fauna on the island.

It is not known why the giant and dwarf species on the island became extinct, but Dr. Meijer said all the fossils of the giant stork, the pygmy elephants and hobbits were found in sediments beneath a layer of volcanic ash, which suggests a volcanic eruption may have caused a major extinction in the region.

The findings, published in the Zoological Journal of the Linnean Society, help explain how wildlife in the Pleistocene adapted to island life.

Explore further: New branch added to European family tree

More information: A new species of giant marabou stork (Aves: Ciconiiformes) from the Pleistocene of Liang Bua, Flores (Indonesia), Zoological Journal of the Linnean Society, 2010, 160, 707–724. DOI:10.1111/j.1096-3642.2010.00616.x

Related Stories

New analysis shows 'hobbits' couldn't hustle

May 06, 2009

A detailed analysis of the feet of Homo floresiensis—the miniature hominins who lived on a remote island in eastern Indonesia until 18,000 years ago -- may help settle a question hotly debated among paleontologists: how si ...

'Hobbit' fossils a new species, anthropologist says

Jan 08, 2009

An analysis of an 18,000-year-old fossil, described as the remains of a diminutive humanlike creature, proves that genuine cave-dwelling "hobbits" once flourished in Southeast Asia, according to a Long Island anthropologist ...

Rediscovering the dragon's paradise lost

Sep 30, 2009

The world's largest living lizard species, the Komodo dragon (Varanus komodoensis), is vulnerable to extinction and yet little is known about its natural history. New research by a team of palaeontologists and ar ...

Invasion of the island bats

May 08, 2007

Ever since the relationship between land area and number of species crystallized into a mathematical power function, islands and island archipelagoes have been thought of as biological destinations where species from large ...

Recommended for you

New branch added to European family tree

Sep 17, 2014

The setting: Europe, about 7,500 years ago. Agriculture was sweeping in from the Near East, bringing early farmers into contact with hunter-gatherers who had already been living in Europe for tens of thousands ...

'Hidden Treasure of Rome' project unveiled

Sep 16, 2014

For more than a century, hundreds of thousands of historical artifacts dating back to before the founding of Rome have been stored in crates in the Capitoline Museums of Rome, where they have remained mostly untouched. Now, ...

NOAA team reveals forgotten ghost ships off Golden Gate

Sep 16, 2014

A team of NOAA researchers today confirmed the discovery just outside San Francisco's Golden Gate strait of the 1910 shipwreck SS Selja and an unidentified early steam tugboat wreck tagged the "mystery wreck." ...

User comments : 0