Chelonoidis Nigra Vandenburghi Collection

Alcedo giant tortoises (Chelonoidis vandenburghi) group resting in water to keep cool, Alcedo Volcano, Isabela Island, Galapagos

Alcedo giant tortoises (Chelonoidis vandenburghi) group resting in water to keep cool, Alcedo Volcano, Isabela Island, Galapagos

Detail of hind toes of Alcedo giant tortoise (Chelonoidis vandenburghi), Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador

Darwin's Small ground finch (Geospiza fuliginosa) cleaning Alcedo giant tortoise (Chelonoidis vandenburghi) of ticks, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador

Alcedo giant tortoise (Chelonoidis vandenburghi), Alcedo Volcano, Isabela Island. This is where the largest extant population exists

Alcedo giant tortoises (Chelonoidis vandenburghi) and volcanic landscape with fumeroles, Alcedo Volcano, Isabela Island, Galapagos

Alcedo Galapagos tortoise (Chelonoidis nigra vandenburghi) group wallowing in mud, Alcedo Volcan, Isabela Island, Galapagos

Alcedo giant tortoise (Chelonoidis vandenburghi), group bathing. Alcedo Volcano, Isabela Island, Galapagos. 2017

Alcedo giant tortoise (Chelonoidis vandenburghi) group resting in pool, Alcedo Volcano, Isabela Island, Galapagos

Alcedo giant tortoise (Chelonoidis vandenburghi) silhouetted at sunrise, Alcedo Volcano, Isabela Island, Galapagos

Alcedo giant tortoise (Chelonoidis vandenburghi) group resting in water at night, Alcedo Volcano, Isabela Island, Galapagos

Alcedo Galapagos tortoise (Chelonoidis nigra vandenburghi) walking, Alcedo Volcan, Isabela Island, Galapagos

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"Discover the Alcedo Giant Tortoise: Chelonoidis nigra vandenburghi" "Cooling off in Style: Alcedo giant tortoises (Chelonoidis vandenburghi) find solace in water" "A Closer Look: Hind toes of the magnificent Alcedo giant tortoise (Chelonoidis vandenburghi)" "Nature's Cleaning Crew: Darwin's Small ground finch helps keep Alcedo giant tortoises tick-free" "Majestic Giants of Isabela Island: Meet the Alcedo giant tortoise (Chelonoidis vandenburghi)" "Where Beauty Meets Power: Alcedo giant tortoises and their volcanic playground" "Embracing Mud Baths: The joyous wallowing of the Alcedo Galapagos tortoise (Chelonoidis nigra vandenburghi)" "Group Therapy for Tortoises: Watch as a gathering of Alcedos enjoy a refreshing bath together" "Nighttime Oasis for Giants: Witness the peaceful rest of an Alcedo giant tortoise group in water" "Graceful Wanderers on Volcanic Terrain: The majestic stride of an Alcedo Galapagos tortoise (Chelonoidis nigra vandenburghi)" "Surviving Dry Seasons with Elegance: How thirsty giants quench their thirst on flat lava landscapes" Note that I have combined some similar hints to create a diverse range of captions within 150 words limit, while still covering all key aspects mentioned in your hints about Chelonoidis nigra vandenburghi species and its behavior/environmental interactions.