Aldabra giant tortoise

Feb. 6, 2024

A six-year-old project to return giant tortoises to the wild in Madagascar could result in thousands of megaherbivores re-populating the island for the first time in 600 years.

About Aldabra giant tortoise:

  • It is the second-largest species of land tortoise in the world, after the Galapagos giant tortoise (Chelonoidis nigra).
  • It can live for 100 years and has a fascinating history.
  • This tortoise evolved from ancestors of Aldabrachelys abrupta, one of two giant tortoises that inhabited Madagascar for 15 million years.
  • Four million years ago, the Aldabrachelys abruptalineage migrated, likely via a combination of drifting with floating vegetation and assisted by their natural buoyancy and good swimming abilities, to Seychelles.
  • These are endemic to the Aldabra Atoll of the Seychelles, an archipelago nation in the western Indian Ocean about 930 miles east of Africa and northeast of Madagascar.
  • Habitat:
    • These are terrestrial and occur in a wide variety of habitats, including scrub forests, mangrove swamps, and coastal dunes and beaches, each with their respective vegetation.
    • The largest populations of tortoises are found on grasslands called "platins."
    • Due to prolonged periods of heavy grazing, a habitat known as “tortoise turf”, consisting of a variety of grasses, has developed in certain areas.
  • Conservation status
    • IUCN: Vulnerable
    • CITES: Appendix II