Award-winning photography of natural history, landscape, antiquity and travel throughout the world. All images © Martin Grace

San Cristobal

Mosaic-finished sculpture of Killer Whale or Orca (Orcinus orca) with welcome sign to San Cristobal outside San Cristobal airport, San Cristobal, Galapagos

Welcome sign to San Cristobal with map of the island, outside San Cristobal airport, San Cristobal, Galapagos

Flower of Giant Prickly Pear Cactus (Opuntia megasperma), San Cristobal, Galapagos

Galapagos Sea Lion (Zalophus californianus wollebacki or wollebaeki) sleeping on a bench beneath the slogan 'Conservemos lo nuestro' (Let us conserve what is ours), Puerto Baquerizo Moreno harbour, San Cristobal, Galapagos

Various vessels at anchor in Puerto Baquerizo Moreno harbour, San Cristobal, Galapagos

Puerto Baquerizo Moreno from anchorage in the harbour, San Cristobal, Galapagos

The rough with the smooth: Galapagos Sea Lion (Zalophus californianus wollebacki) sleeping on volcanic rocks at Puerto Baquerizo Moreno, San Cristobal, Galapagos

Wild San Cristobal Giant Tortoise (Geochelone elephantopus chatamensis), San Cristobal

Wild San Cristobal Giant Tortoise (Geochelone elephantopus chatamensis) showing the pattern of plates on its carapace, San Cristobal

Young San Cristobal Giant Tortoise (Geochelone elephantopus chatamensis) at the Galapaguena de Cerro Colorado breeding station, San Cristobal

Young San Cristobal Giant Tortoises (Geochelone elephantopus chatamensis) at the Galapaguena de Cerro Colorado breeding station, San Cristobal

Young San Cristobal Giant Tortoise (Geochelone elephantopus chatamensis) at the Galapaguena de Cerro Colorado breeding station, San Cristobal

Enclosure to protect young San Cristobal Giant Tortoises (Geochelone elephantopus chatamensis) from predation, Galapaguena de Cerro Colorado breeding station, San Cristobal

Lava Lizard male (Microlophus bivittatus), endemic to San Cristobal, Galapagos

Yellow Warbler male (Dendroica petechia aureola), San Cristobal, Galapagos

Yellow Warbler female (Dendroica petechia aureola), San Cristobal, Galapagos

Chatham Mockingbird (Nesomimus melanotis), San Cristobal, Galapagos

Medium Ground Finch female (Geospiza fortis), San Cristobal, Galapagos

Bright pink lichen growing on a tree branch, San Cristobal, Galapagos

Small Ground Finch female (Geospiza fuliginosa), San Cristobal, Galapagos

Blue-Footed Booby (Sula nebouxii excisa) on the stratified volcanic ash cliffs of Punta Pitt, San Cristobal

Tourist ship M/V La Pinta anchored off Punta Pitt, San Cristobal, Galapagos Islands

Galapagos Sea Lion (Zalophus californianus wollebacki or wollebaeki) at the head of the beach at Punta Pitt, San Cristobal, Galapagos Islands

Rather jaundiced look from a Galapagos Sea Lion (Zalophus californianus wollebacki or wollebaeki) at the head of the beach at Punta Pitt, San Cristobal, Galapagos Islands

Galapagos Sea Lion (Zalophus californianus wollebacki or wollebaeki) resting on the beach at Punta Pitt, San Cristobal, Galapagos Islands

Half-hearted display of aggression from Galapagos Sea Lion (Zalophus californianus wollebacki or wollebaeki), Punta Pitt, San Cristobal, Galapagos Islands. Sea Lion bites are a serious risk of infection - you can see why!

Volcanic landform at Punta Pitt, San Cristobal, Galapagos Islands

Young Giant Prickly Pear Cactus (Opuntia megasperma) growing among leafless deciduous shrubs at Punta Pitt, San Cristobal, Galapagos Islands

Pair of Great Frigatebirds (Fregata minor ridgwayi) at their tree nest high up the cliff face at Punta Pitt, San Cristobal, Galapagos Islands

Tourist ship M/V La Pinta anchored off Punta Pitt, San Cristobal, Galapagos Islands

The volcanic landscape at Punta Pitt, showing deciduous shrub vegetation above the beach, Punta Pitt, San Cristobal, Galapagos

Muyuyo (Muyuyu, Yellow Cordia or Glue Bush) (Cordia lutea), Punta Pitt, San Cristobal, Galapagos

Lava Lizard (Microlophus bivittatus), endemic to San Cristobal, Punta Pitt, San Cristobal, Galapagos

Marine Iguana female (Amblyrhynchus cristatus mertensi) laying eggs down her nest hole, inland at Punta Pitt, San Cristobal, Galapagos

Marine Iguana female (Amblyrhynchus cristatus mertensi) straddling her nest hole, inland at Punta Pitt, San Cristobal, Galapagos

Marine Iguana female (Amblyrhynchus cristatus mertensi) by her nest hole, inland at Punta Pitt, San Cristobal, Galapagos

Red-Footed Booby (Sula sula websteri), panting with the heat, shades her single chick from the sun, Punta Pitt, San Cristobal, Galapagos

Galapagos Carpetweed (Sesuvium edmonstonei), Punta Pitt, San Cristobal, Galapagos

Tourist ship M/V La Pinta anchored off Punta Pitt, San Cristobal, Galapagos Islands

Giant Prickly Pear Cactus (Opuntia megasperma) at Punta Pitt, San Cristobal, Galapagos Islands

Great Frigatebird (Fregata minor ridgwayi) in classic silhouette, Punta Pitt, San Cristobal, Galapagos Islands

Blue-Footed Booby (Sula nebouxii excisa) on the stratified volcanic ash cliffs of Punta Pitt, San Cristobal

Blue-Footed Booby (Sula nebouxii excisa) preening its tail feathers on the stratified volcanic ash cliffs of Punta Pitt, San Cristobal

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