Tag: extinction

The long night: how the Ice Age drove blue-eyed shag evolution

The first snow had started to settle on the bare ground. Soon the shag will have to make a choice.

Should it stay to battle the elements and potentially face death during the long night, or attempt a perilous journey to find a new home? By the time sea-ice surrounds its craggy island, creeping up from the south like an army of white walkers, it may be too late.

Beware white walkers: Chatham Island shags (L. onslowi) on watch at the refugial Rēkohu Chatham Islands. Photo courtesy of Oscar Thomas.

Scientists know a lot about how the Ice Age affected animals in the landlocked Northern Hemisphere. Vast kilometre-high ice sheets covered large parts of Eurasia and North America. Animals migrated into refugia and when the ice finally released its cold grip on the world, they expanded back out again. It’s practically the plot of the Ice Age movies. Continue reading “The long night: how the Ice Age drove blue-eyed shag evolution”

The little frog with a big legacy

In the bowels of the Museum of New Zealand Te Papa Tongarewa, the little frog waited. In 2005 scientists had released its bones from its sediment tomb on the banks of the Waipara River in North Canterbury.

The discoverers – Bruce Marshall, Phil Maxwell, and Al Mannering – had carefully collected the tiny bones that remained and deposited them in the museum where they were identified as belonging to a frog before they were gently packed away. There the little frog waited like a heirloom toy waiting for the next generation of scientists to rediscover and treasure it.

A few years later the lid was lifted on the little frogs’ new home. Its bones were carefully taken from its box and placed under the microscope. Every bump and groove was described in detail and compared to other frogs from around Aotearoa New Zealand. Continue reading “The little frog with a big legacy”

Through the looking glass: Fossils reveal a Miocene Wonderland at St Bathans

It’s the height of the Central Otago summer – barren, dry and dusty. Driving down the gravel road to St Bathans, we’re travelling back in time, down the rabbit hole to a world long gone. Only ghosts remain of this lost world and that’s what we’ve come here to find. The fossilised bones of a myriad of animals dating back some 16-19 million years from the Miocene period can be found in the sediments of the surrounding area. Continue reading “Through the looking glass: Fossils reveal a Miocene Wonderland at St Bathans”

A tale of two penguins: Bice and Rosie

New Zealand has long been considered the cradle of penguin evolution. But two new fossil discoveries, affectionately known as Bice’s, (pronounced Bee-chee’s), and Rosie’s Penguins, are rewriting early penguin evolution and have taken the world by storm. Move aside Penguins of Madagascar; there are some new and cool kids on the block!

But how did we get to this point and what is Bice’s and Rosie’s tale? Continue reading “A tale of two penguins: Bice and Rosie”

Introducing the Poūwa: New Zealand’s unique and ill-fated black swan 

Step inside a TARDIS and travel to prehistoric New Zealand and the landscape looked very different.

Moa roamed the forests, Haast’s Eagle soared in the sky and you would have met a very tall, heavy and potentially grumpy swan. This is the Poūwa – New Zealand’s newest species discovered by my team (published today in Proceedings B) including collaborators from the Otago Palaeogenetics Laboratory (University of Otago), Canterbury Museum and the Museum of New Zealand Te Papa Tongarewa. But how did we get to this point? Continue reading “Introducing the Poūwa: New Zealand’s unique and ill-fated black swan “