The giant tortoise

From the Good News network:

2023 was a banner year for the Galapagos Islands: that wondrous archipelago so famous for its giant tortoises and other endemic species.

The long-serving conservation organization the Galapagos Conservancy, also endemic to the islands, recently published its annual report featuring standout figures like over 500 giant tortoises of 5 different species reintroduced to their natural habitat.

Additionally, a critically endangered species of albatross was identified to use giant tortoise feeding sites as take-off and landing areas. This key insight into co-dependency has given the Conservancy confidence that they can restore the populations of both animals to stable, flourishing numbers.

It underscores how far a donation to these endemic wildlife organizations really does go, and these two highlights of a successful year were only possible by the over $6 million in charitable contributions from supporters.

30 Chelonoidis chatamensis tortoises endemic to the smaller island of San Cristobal were repatriated to their natural habitat from the stock of a captive breeding program, while 97 native tortoises were returned to the second-largest island of Santa Cruz.

On the largest island of Isabella, 350 tortoises (214 C. guntheri and 136 C. vicina) were successfully reintroduced to their natural habitat after a survey found their numbers were not rising substantially on their own.

In March, the repatriation of 86 juvenile Chelonoidis hoodensis tortoises significantly contributed to enhancing the species’ distribution across their native habitat. They currently number 3,000 today on Española or Hood Island, a miraculous recovery from the 14 found there in the 1960s.

Also on Española, the endemic waved albatross was found to be taking off and landing on 50 additional parts of the island. These large birds, boasting an 8-foot wingspan, need ample space to get a running start before taking off, and this same principle applies when applying the brakes coming down from the sky.

In the survey, the biologists observed that concentrations of giant tortoises were linked with the usage of areas as runways for the albatross. Because the tortoises are the largest herbivores in the ecosystem, they perform the same acts as bison do in North America and Europe, and elephants in Africa—clear space.

With their herbivorous diet and large bulk, the tortoise’s feeding habits produce cleared areas ideal for albatross use.

“This discovery underscores the interconnectedness of the Galápagos ecosystem,” the authors of the report write. “This newly acquired knowledge allows us to strengthen the synergies between our conservation strategies.”