New Zealand Cave Reveals 16 Fossil Species From 1 Million Years Ago
Updated
Updated · ScienceDaily · Jun 23
New Zealand Cave Reveals 16 Fossil Species From 1 Million Years Ago
3 articles · Updated · ScienceDaily · Jun 23
Summary
Waitomo cave fossils dated to about 1 million years ago have uncovered 12 bird species and four frog species, the first large terrestrial vertebrate assemblage from that period in New Zealand.
Two volcanic ash layers—one about 1.55 million years old and another about 1 million years old—bracketed the remains, letting researchers date the site precisely and identify it as the oldest known cave on New Zealand's North Island.
Researchers say the fossils show a markedly different avifauna from the one humans later encountered, with roughly 33% to 50% of species disappearing before human arrival as eruptions and rapid climate shifts reshaped habitats.
Among the finds was Strigops insulaborealis, a newly identified relative of the kākāpō whose weaker leg bones suggest it may have spent less time climbing and possibly still flown.
The discovery fills a major gap between New Zealand's 20- to 16-million-year-old St Bathans fossils and later records, pushing back evidence that natural upheaval was already driving extinction and evolution long before settlement 750 years ago.
Mass extinctions rocked New Zealand long before humans. Are we misjudging the true fragility of its unique ecosystems?
Scientists just unveiled a lost world under New Zealand. What other secrets are trapped in ancient volcanic ash?
A flying kākāpō ancestor was just discovered. What made New Zealand’s ancient birds give up their wings?
Moa Eggshell Cave Reveals a Million-Year Fossil Record: How Volcanic Catastrophes and Climate Shaped New Zealand’s Unique Wildlife
Overview
The recent re-examination of Moa Eggshell Cave has transformed our understanding of New Zealand’s ancient past. Although fossils were first collected decades ago, palaeontologists found that the site’s surface had barely been explored, revealing a prehistoric treasure trove. This cave is now recognized as the first in New Zealand to provide a clear fossil record from the Early Pleistocene, about one million years ago. Thanks to unique geological conditions, researchers could precisely date the fossils, filling a critical gap in natural history and offering an unprecedented glimpse into an ecosystem that existed long before humans arrived.