Paleontologists Unearth 1-Million-Year-Old New Zealand Fossils, Identifying 2 New Bird Species
Updated
Updated · Earth.com · Jun 24
Paleontologists Unearth 1-Million-Year-Old New Zealand Fossils, Identifying 2 New Bird Species
3 articles · Updated · Earth.com · Jun 24
Summary
Moa Eggshell Cave on New Zealand’s North Island yielded 1-million-year-old bird and frog fossils, including two newly identified birds and the oldest known North Island frog fossils.
Two volcanic ash layers fixed the deposit’s age: the older Ngaroma ash dates to about 1.55 million years, while younger Kidnappers ash shows the bones below it are older than 1 million years.
Twenty-one usable bird bones revealed 12 bird types, with at least four—and possibly six—absent from younger fossil sites, indicating major bird turnover long before humans reached New Zealand.
The frogs told a different story: four Leiopelma species matched much younger local frogs in shape and size, suggesting little evolutionary change over roughly 1 million years.
Researchers say harsher ice-age climate swings and massive volcanic eruptions that buried about 44,000 square kilometers of the North Island may explain why birds changed sharply while frogs remained stable.
Why did ancient frogs survive unchanged while a third of New Zealand's birds vanished after massive volcanic eruptions?
With only 235 kākāpō left, what can a million-year-old ancestor teach us about avoiding modern extinction?
Waitomo’s Million-Year Fossil Record Uncovers Volcanic and Climate-Driven Extinctions in New Zealand
Overview
A groundbreaking discovery in a cave near Waitomo, New Zealand, has revealed a million-year-old fossil assemblage that offers a unique window into the country’s ancient past. The fossils include 12 bird species and 4 frog species, some never seen before, such as a newly described parrot and an extinct ancestor of the takahē. These finds show that New Zealand’s ecosystems were once much richer and more complex than previously thought, challenging the idea that its ancient wildlife was stable. This discovery reshapes our understanding of how New Zealand’s pre-human ecosystems changed over time.