Overview
The Galapagos Pink Land Iguana (Conolophus marthae) is a critically endangered, colossal reptile discovered by national park rangers in 1986 and formally described to science in 2009. Restricted exclusively to the upper slopes of Wolf Volcano on northern Isabela Island in the Galapagos Archipelago, this remarkable lizard diverged from all other Galapagos land iguanas more than five million years ago, making it an ancient founding lineage of the islands.
Biology and Physical Characteristics
Conolophus marthae is unmistakable due to its vivid salmon-pink body coloration laced with bold black transverse vertical stripes and patches across its torso. Unlike its yellow-hued cousins, the pink land iguana features a relatively small, flattened head crest, a heavy muscular neck, and thick tuberculate skin. Its stout limbs terminate in long, sharp claws adapted for digging nest burrows into hard volcanic ash and navigating rugged basalt lava flows.
Behavior and Ecology
Diurnal and ectothermic, the pink land iguana spends mornings basking atop warm black volcanic rocks to reach optimal metabolic temperatures. It grazes primarily on prickly pear cacti (Opuntia), fallen fruits, and low desert shrubs, deriving almost all required moisture from succulent vegetation. During the breeding season, males vigorously defend volcanic territories by nodding their heads, inflating their throats, and engaging in ritualized head-pushing contests.
Conservation and Human Impact
Evaluated as Critically Endangered by the IUCN, the pink land iguana survives as a single isolated population of approximately 200 to 300 individuals occupying a tiny 25-square-kilometer zone atop Wolf Volcano. The species faces grave peril from introduced feral cats and black rats that prey on hatchlings and eggs, alongside catastrophic volcanic eruptions from the active Wolf Volcano.
Interesting Factoid
Genetic research shows the pink land iguana branched off from all other Galapagos iguanas 5.7 million years ago—predating the emergence of its home island Isabela, meaning its ancestors lived on older, now-submerged volcanic islands of the archipelago.
Last updated: October 2026