Cheryl-Samantha Owen / Aldabra giant tortoise (Geochelone gigantea) on beach at dusk, Aldabra Atoll, Seychelles, Indian Ocean

Adam White / Giant tortoise {Geochelone elephantopus} wave breaking on back, Aldabra, Seychelles

Huw Cordey / Marine litter - mostly shoes (flip flops) and plastic bottles washed up on shore with Aldabra giant tortoise (Aldabrachelys gigantea). Cinq Cases, Aldabra Island, Indian Ocean

Huw Cordey / Marine litter - mostly shoes flip flops) and plastic bottles washed up on shore with Aldabra giant tortoise (Aldabrachelys gigantea). Cinq Cases, Aldabra Island, Indian Ocean

Huw Cordey / Pathway made of plastic shoes ( flip flops) washed up on the beach and collected within 20 metres of the middle of the picture. In the background is a Aldabra giant tortoise (Aldabrachelys gigantea)...

Franco Banfi / Giant tortoises (Geochelone gigantea), Aldabra Atoll, Natural World Heritage Site, Seychelles, Indian Ocean.

Franco Banfi / Giant tortoise (Geochelone gigantea), Aldabra Atoll, Natural World Heritage Site, Seychelles, Indian Ocean.

Martin Gabriel / Aldabra Giant Tortoise (Dipsochelys dussumieri), mating couple, La Digue Island, Republic of Seychelles. Captive.

Juergen & Christine Sohns / Aldabra Giant Tortoise (Aldabrachelys gigantea), Heidelberg, Germany

Juergen & Christine Sohns / Aldabra Giant Tortoise (Aldabrachelys gigantea), Heidelberg, Germany

Juergen & Christine Sohns / Aldabra Giant Tortoise (Aldabrachelys gigantea), Heidelberg, Germany

Juergen & Christine Sohns / Aldabra Giant Tortoise (Aldabrachelys gigantea) grazing, Heidelberg, Germany

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) carapace / shell detail from above, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) remains of one that fell into deep crevice in the eroded coral, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) in the dunes on the south coast of Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) grazing on grass, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) in rocky terrain, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) group of six in sand dunes near lagoon, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) two resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) in eroded coral landscape, Picard island, Natural World Heritage Site, Aldabra 2005

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) portrait on Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) grazing on grass on Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) close up of retracted head, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) on Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) in rocky habitat with head raised, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) on Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) in very rocky terrain, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) portrait on beach, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) portrait on beach, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) head portrait, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) head portrait, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) portrait on beach, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) aerial view of the dunes on the south coast of Grand Terre, lagoon in distance, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoises (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant Tortoise (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant tortoise (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Willem Kolvoort / Aldabra Giant tortoise (Aldabrachelys gigantea) resting in a pool to keep cool, Grand Terre, Natural World Heritage Site, Aldabra

Daniel Heuclin / Aldabra giant tortoise (Geochelone gigantea), keepers administrating worming medicine. Captive. Occurs on the Aldabra atoll, Seychelles

Daniel Heuclin / Aldabra giant tortoise (Geochelone gigantea), keepers administrating worming medicine. Captive. Occurs on the Aldabra atoll, Seychelles.

Cheryl-Samantha Owen / Aldabra giant tortoise (Geochelone gigantea) walking along the sea shore, Aldabra Atoll, Seychelles, March

Ben Lascelles / Aldabra Giant Tortoise (Geochelone gigantea) head portrait. Mauritius.

Ben Lascelles / Aldabra Giant Tortoise (Geochelone gigantea) head in profile. Mauritius.

Mark Carwardine / Aldabra giant tortoise (Geochelone gigantea) captive, vulnerable, from Aldabra and Seychelles, Bristol Zoo

Loic Poidevin / Aldabra giant tortoise (Geochelone gigantea) pair mating, Curieuse Marine National Park, Seychelles, Indian Ocean

Loic Poidevin / Aldabra giant tortoise (Geochelone gigantea) pair mating, Curieuse Marine National Park, Seychelles, Indian Ocean

Stephen Dalton / Seychelles Giant Tortoise (Dipsochelys dussumieri) walking fast, Seychelles, captive, extinct in the wild

Michael D. Kern / Aldabra tortoise {Geochelone gigantea} close-up profile of head and legs, captive, Aldabra Islands

Pete Oxford / Aldabran giant tortoises (Geochelone gigantea) feeding on 'tortoise turf', Picard Island, Aldabra Atoll, Seychelles, Indian Ocean

Miles Barton / Aldabran giant tortoise (Geochelone gigantea) stretching to feed on leaves on high branch, Aldabra Atoll, Seychelles, Indian Ocean. Taken on location for "Natural World: Seychelles"

Adam White / Aldabra giant tortoise {Geochelone gigantea} walking up beachfrom sea, Mahe, Seychelles 1999

Pete Oxford / Aldabra giant tortoise {Geochelone gigantea} cooling in water, Picard Is, Aldabra, Seychelles

Miles Barton / Aldabra giant tortoise {Geochelone gigantea} browsing, Aldabra, Seychelles

Pete Oxford / Aldabra giant tortoises {Geochelone gigantea} resting in shade of vegetation, Aldabra, Seychelles

Chris Gomersall / Aldabra giant tortoise {Geochelone gigantea} 'George', Cousin Island, Seychelles

Adam White / Giant tortoise {Geochelone elephantopus} swimming in sea, Aldabra, Seychelles

Pete Oxford / Aldabra tortoise on beach {Geochelone gigantea} Picard Island, Aldabra, Seychelles

Pete Oxford / Aldabra tortoise on beach {Geochelone gigantea} Aldabra atoll, Seychelles

Pete Oxford / Aldabra tortoise in wallow {Geochelone gigantea} Aldabra, Seychelles

Tom Vezo / Aldabra tortoises mating {Geochelone gigantea} Aldabra Zoo, Seychelles captive

Miles Barton / Aldabra tortoise grazing on tree {Geochelone gigantea} Aldabra, Seychelles

Adam White / Giant tortoise {Geochelone elephantopus} on shore after swimming, Aldabra, Seychelles

Pete Oxford / Aldabra tortoise, Grande Terre Island, Aldabra Atoll, Seychelles.

Pete Oxford / Aldabra tortoise {Geochelone gigantea} on beach Aldabra Atoll, Picard Island, Seychelles

Pete Oxford / Aldabra tortoises (Geochelone gigantea) resting in shade. Picard Island, Aldabra, Seychelles

Pete Oxford / Aldabra tortoise (Geochelone gigantea) razing. Picard Island, Aldabra, Seychelles

Pete Oxford / Aldabra tortoise (Geochelone gigantea). Picard Island, Aldabra Atoll, Seychelles

Adam White / Aldabra tortoise swimming {Geochelone gigantea} Mahe, Seychelles

Miles Barton / Aldabra giant tortoises shelter from sun resting in shade {Geochelone gigantea} Seychelles

Miles Barton / Land hermit crabs {Coenobitidae} feed on Giant tortoise dung, Aldabra,

Miles Barton / 4 month old Aldabra giant tortoise beside adult {Geochelone gigantea} Seychelles

Adam White / Aldabra giant tortoise laying eggs {Geochelone gigantea} Mahe, Seychelles

Adam White / Aldabra giant tortoise swimming {Geochelone gigantea} Mahe, Seychelles

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) eye detail, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) head portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) head portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) head portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) feeding on fruit, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) head portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) head portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) feeding on fruit, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) juvenile, portrait, L'ile aux Aigrettes, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) juvenile, stuck lying on it's back in the mud, L'ile aux Aigrettes, Mahebourg, Mauritius.

Roland Seitre / Aldabra giant tortoise (Aldabrachelys gigantea) feeding, head portrait, La Digue, Seychelles.

Roland Seitre / Aldabra Giant Tortoise (Aldabrachelys gigantea) in defensive posture, Rodrigues, Mauritius

Roland Seitre / Aldabra Giant Tortoise (Aldabrachelys gigantea), Rodrigues, Mauritius

Roland Seitre / Aldabra Giant Tortoise (Aldabrachelys gigantea), Rodrigues, Mauritius

Roland Seitre / Aldabra Giant Tortoise (Aldabrachelys gigantea), Rodrigues, Mauritius