Rarotonga

May

2026

The Mournful Ladies

Gerald McCormack, CINHT

Mournful Gecko and Parent species – J. Newsome

The Mournful Gecko (Lepidodactylus lugubris), about 80mm from nose to tail-tip, is the most common household lizard in the Cook Islands and throughout the Pacific. Like other gecko lizards, it hides during the day and hunts insects at night, especially on walls near lights. It has wide toes with minute hairs underneath, which enable it to climb seemingly smooth vertical surfaces and to walk upside-down on ceilings.

Although Mournful Geckos usually congregate together, they give noisy “CHIK-CHIK-CHIK-CHIK-CHIK-CHIK” calls to warn each other to keep a suitable distance, and they follow up with a vigorous physical attack when the warning is ignored. Continue reading →

May

2026

Red-tailed Tropicbird, Tavake

Adult in flight – Cook Islands, Takūtea – Gerald McCormack

Gerald McCormack, CINHT

The Red-tailed Tropicbird (Tavake Phaethon rubricauda) is a snow-white seabird with a red bill and slender red tail. It nests during the winter months in moderate numbers on the cliffs behind Avarua and is often seen flying over the island. It has a raucous call and performs dramatic loop-the-loop courtship displays. The largest Cook Islands colonies are on Takutea (near Atiu), Suwarrow, and Palmerston and a small population on Mā’ina-iti, Aitutaki.

It is a rare nester on most peopled-atolls because it is a favourite traditional food and domestic dogs often disturb the nests. Palmerston is an interesting exception because the tropicbird remains common despite more than a hundred years of harvesting. The secret of its survival has been that Palmerston islanders harvest the “mature” nestlings only every 28^th day, and enough fledge between harvests to maintain the colony.

Continue reading →

May

2026

The Strangler Vine of Rarotonga

Grand Balloon‑vine, Leaves, flowers and fruit – Cook Islands, Rarotonga – Gerald McCormack

Gerald McCormack, CINHT,

Weeds are plants growing in the wrong place; plants which take time, effort and money to control. The weeds of taro plots, lawns, home gardens and horticultural areas are often encountered and well known. Less obvious are weeds which damage the native forests of inland Rarotonga. The forests which reduce erosion and protect the water supply; the forests which are an economic asset in the tourist industry; the forests which are an aesthetic asset to us all; and, the forests which contain plants and animals not found anywhere else in the world. Continue reading →

May

2026

Hummingbirds in the Cook Islands?

Gerald McCormack, CINHT

Sometimes in the evening bird-like creatures hover over flowers while probing them with a long slender beak. Are they hummingbirds?

Gnathothlibus erotus Caterpillar or Hornworm – Cook Islands, Manihiki – Gerald McCormack

Although they look like the hummingbirds of books and films these creatures are actually large moths, known as hawk-moths or sphinx-moths. They have strong slender wings enabling them to fly very fast and to hover. They are nocturnal feeders, usually starting around dusk. Their caterpillars are called hornworms, because they have a long horn on the rear end. Continue reading →

Apr

2026

Searching for Rare Plants

Gerald McCormack, CINHT

The expedition team from left to right: Jason Tuara, Joe Brider, Edwin Apera (back), Jacqui Evans, Gerald McCormack and photo by Judith Kunzlé.

It has long been hoped that pristine forests at the base of remote and almost inaccessible cliffs might have thriving populations of some of Rarotonga’s rarest plants – maybe even the Pilea, which has not been seen for 80 years.

In July (2010) the Natural Heritage Trust launched a project to assess the status of Rarotonga’s rarest plants. With the assistance of two New Zealand botanists, they explored the island’s native forest, but unfortunately, with one exception, only saw previously known plants. The top ridges of the main mountains were visited, but there is one area the survey failed to get to: the cliffs below the highest ridge, between Te Manga and Te Atukura, in the upper Avana. Continue reading →

Rarotonga

The Mournful Ladies

Red-tailed Tropicbird, Tavake

The Strangler Vine of Rarotonga

Hummingbirds in the Cook Islands?

Searching for Rare Plants

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