Island gigantism - Species Extinction

Giant Haast's eagle attacking New Zealand moa

A Haast's eagle attacks already extinct New Zealand moas. The largest moas were the female South Island giant moas. They could reach a weight of up to 300 kilograms. (© John Megahan, CC BY 2.5, via Wikimedia Commons)

2024-09-17 Doreen Fräßdorf

Haast’s Eagle

The largest bird of prey in modern times Before humans settled in New Zealand around 700 years ago and introduced invasive species like cats and rats, there were no land-dwelling mammals on the islands – aside from three species of bats. Instead, the ecosystem was dominated by approximately 250 bird

New Zealand's unique birdlife evolved in isolation over millions of years. This late 19th-century illustration depicts a hunting scene involving moas. (© Joseph Smit, Public domain, via Wikimedia Commons)

2024-07-29 Doreen Fräßdorf

In the Footsteps of Moas: Where New Zealand’s Flightless Birds Find Refuge

The settlement of the Pacific Islands by humans led to rapid waves of extinction for many animal species, whose dynamics are difficult to reconstruct. Among the affected species were the wingless moas, which were only found in New Zealand. These often massive birds went extinct in the 14th or 15th

Illustration of the Cape Verde Giant Skink by J. Terrier from 1885. Males could reach a body length of around 50 centimeters, and females around 43 centimeters (including the tail). The weight of the animals was almost half a kilogram. (© J. Terrier, Public domain, via Wikimedia Commons)

2024-07-25 Doreen Fräßdorf

Cape Verde Giant Skink

Ilhas Desertas – The terra typica of the Cape Verde giant skink Organisms that occur in isolated ecosystems such as islands are often adapted to the extreme conditions prevailing there. They exhibit characteristics such as dwarfism or gigantism and often lack defensive mechanisms due to the absence of predators, setting

Bones of the North Island giant moa at the <a href="https://www.aucklandmuseum.com/" target="_blank" Auckland War Memorial Museum. (© Auckland Museum, CC BY 4.0, via Wikimedia Commons)

2024-06-01 Doreen Fräßdorf

North Island Giant Moa

The second largest moa species This moa species inhabited bush, grass, and dune lands, as well as forests on New Zealand’s North Island. The North Island giant moa is considered the second largest moa species. The largest species is the South Island giant moa, which was endemic to New Zealand’s

Replica of the Gigarcanum or Kawekaweau gecko from the Lille Natural History Museum in France. (© Musée d'Histoire Naturelle de Lille, CC BY-SA 4.0, via Wikimedia Commons)

2024-05-30 Doreen Fräßdorf

Gigarcanum (Giant Gecko)

The largest gecko in the world… In the early 1980s, French museum employee Alain Delcourt discovered a forgotten specimen of a single stuffed giant gecko in the basement of the Natural History Museum of Marseille, which had previously been on public display for years. This species was previously unknown to