Ingo Arndt / Snow covered Cerro Paine Grande in the Cordillera Paine massif. At sunrise, Torres del Paine National Park, Patagonia, Chile. April 2017.

Tui De Roy / Galapagos fur seal (Arctocephalus galapagoensis) large territorial bull on volcanic rocks. South Coast Cerro Azul (Cinco Cerros), Isabela, Galapagos Islands, Ecuador, June.

Konrad Wothe / Giant old tree in the rainforest at Cerro de la Muerte, Costa Rica 2007

Konrad Wothe / Mossy tree in mountainous rainforest at Cerro de la Muerte, Costa Rica

Andy Rouse / Marine Iguana (Amblyrhynchus cristatus) walking along beach. Cerro Dragon, Galapagos, September.

Oriol Alamany / Laguna Torre and Grande glacier below Cerro Torre (3102 m), Los Glaciares National Park, Andes, Patagonia, Argentina, January 2006

Michael Hutchinson / Cerro Fitz Roy with clouds behind, seen across reed-filled lake, Los Glaciares National Park, Argentina February 2009

Colin Monteath / East Face of Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Pete Oxford / Galapagos sealion (Zalophus californianus wollebaeki) sunning on rock, Cerro Brujo, San Cristobal Is, Galapagos

Jack Dykinga / Cerro Colorado volcano crater at sunset with Sierra de los Tanques in background, Biosphere Reserve of Pinacate and Gran Desierto Altar, Sonora, Mexico

ZSSD / Panamanian Golden Frog (Atelopus zeteki) pair in amplexus, native to Panama

Colin Monteath / Cerro Torre and Fitzroy reflected in small pond at dawn, Loma Plieque Tumbado, Los Glaciares National Park, Patagonia, Argentina

Colin Monteath / Hiker, Cerro Torre and Fitzroy reflected in small pond at dawn, Loma Plieque Tumbado, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Spectacled Bear (Tremarctos ornatus) portrait of Cuto, prime male in rehabilitation center, Cerro Chaparri, Lambayeque, Peru

Tui De Roy / Cerro Azul caldera with lake and tufa cone at 5,900 feet, Cerro Azul Volcano, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, radial flank fissure, February 1979, lava fountaining from splatter cone at dusk, Cerro Azul, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, spatter cone formation and lava fountain from radial fissure, February 1979, Cerro Azul east flank, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, spatter cone formation and lava fountain from radial fissure, February 1979, Cerro Azul east flank, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, spatter cone formation and lava fountain from radial fissure, February 1979, Cerro Azul east flank, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / King Vulture (Sarcoramphus papa) in natural arid forest habitat, Cerro Chaparri, Lambayeque Province, Peru

Ingo Arndt / Domestic sheep (Ovis aries) shearing. Cerro Castillo, Torres del Paine area, Patagonia, Chile. April 2018.

Ingo Arndt / Wool from Domestic sheep (Ovis aries) packaged in warehouse. Cerro Castillo, Torres del Paine area, Patagonia, Chile. .

David Perpinan / Assisted feeding in a Panamanian golden frog (Atelopus zeteki) in a captive breeding program. United States. August 2007. Critically endangered. small repro only

Ingo Arndt / Domestic Sheep (Ovis aries) flock, Cerro Castillo, Patagonia, Chile

Ingo Arndt / Domestic Sheep (Ovis aries) flock, Cerro Castillo, Patagonia, Chile

Ingo Arndt / Domestic Sheep (Ovis aries) shearing, Cerro Castillo, Patagonia, Chile

Tui De Roy / Blue-footed booby (Sula nebouxii) diving into sea, wings outstretched. Cerro Brujo, San Cristobal island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) folding wings as it dives towards sea. Cerro Brujo, San Cristobal Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) folding wings as it dives. Cerro Brujo, San Cristobal Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) folding wings as it dives. Cerro Brujo, San Cristobal Island, Galapagos.

Juan Carlos Munoz / Iberian ibex (Capra pyrenaica), herd on rocky cliffs, Maro-Cerro Gordo Cliffs Natural Area, Granada, Andalusia, Spain. January 2018.

Juan Carlos Munoz / Iberian ibex (Capra pyrenaica) amongst scrub, Cliffs of Maro-Cerro Gordo Natural Area, Granada, Andalusia, Spain. January.

Juan Carlos Munoz / Iberian ibex (Capra pyrenaica), two on cliffs, Maro-Cerro Gordo Cliffs Natural Area, Granada, Andalusia, Spain. January 2018.

Juan Carlos Munoz / Iberian ibex (Capra pyrenaica) herd, Maro-Cerro Gordo Cliffs Natural Area, Granada, Andalusia, Spain. January 2018.

Juan Carlos Munoz / Iberian ibex (Capra pyrenaica) on rocky clifftop, two headbutting one another. Maro-Cerro Gordo Cliffs Natural Area, Granada, Andalusia, Spain. January 2018.

Juan Carlos Munoz / Iberian ibex (Capra pyrenaica) standing on top of rock, Maro-Cerro Gordo Cliffs Natural Area, Granada, Andalusia, Spain. January 2018.

Franco Banfi / Masked booby (Sula dactylatra) in front of El Cerro de la Mona, Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Masked booby (Sula dactylatra) in front of El Cerro de la Mona, Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Tui De Roy / Blue-footed Booby (Sula nebouxii) plunge diving, Cerro Brujo, San Cristobal Island, Galapagos Islands, Ecuador

Yva Momatiuk & John Eastcott / Guanaco (Lama guanicoe) group near mountains, Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Yva Momatiuk & John Eastcott / Peaks, Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Yva Momatiuk & John Eastcott / Peaks, Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Eastern Santa Cruz Tortoise (Chelonoidis nigra donfaustoi), newly described species, Cerro Mesa, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / Eastern Santa Cruz Tortoise (Chelonoidis nigra donfaustoi), newly described species, Cerro Mesa, Santa Cruz Island, Galapagos Islands, Ecuador

Ingo Arndt / Cerro Paine Grande peak at sunrise, Torres del Paine NP, Paragonia, Chile

Jack Dykinga / Desert environment in the Pinacate and Grand Desert Biosphere Reserve, Cerro Coloardo near the border wall along the US-Mexican border through the Sonoran Desert in Arizona and Mexico. January 2009.

Sebastian Kennerknecht / Mountain Lion (Puma concolor) female in front of mountains, Torres del Paine National Park, Patagonia, Chile

Sebastian Kennerknecht / Mountains reflected in saline lake, Amarga Lagoon, Torres del Paine, Torres del Paine National Park, Patagonia, Chile

Sebastian Kennerknecht / Guanaco (Lama guanicoe), Torres del Paine National Park, Patagonia, Chile

Sebastian Kennerknecht / Mountain range in autumn, Torres del Paine, Torres del Paine National Park, Patagonia, Chile

Sebastian Kennerknecht / Clouds at sunrise over mountain range, Torres del Paine National Park, Patagonia, Chile

Ingo Arndt / Cerro Torre and Mount Fitz Roy, Los Glaciares National Park, Andes, Patagonia, Argentina

Ingo Arndt / Cerro Torre shortly before sunrise with Laguna Torre and Grande Glacier, Los Glaciares National Park, Andes, Patagonia, Argentina

Ingo Arndt / Cerro Torre shortly before sunrise with Laguna Torre and Grande Glacier, Los Glaciares National Park, Andes, Patagonia, Argentina

Ingo Arndt / Cerro Torre shortly before sunrise with Laguna Torre and Grande Glacier, Los Glaciares National Park, Andes, Patagonia, Argentina

Ingo Arndt / Cerro Torre shortly before sunrise with Laguna Torre and Grande Glacier, Los Glaciares National Park, Andes, Patagonia, Argentina

Sylvain Cordier / Medium ground finch (Geospiza fortis), female eating seeds, Cerro Dragon, Santa Cruz island, Galapagos Island.

Sylvain Cordier / Medium ground finch (Geospiza fortis), female eating seeds, Cerro Dragon, Santa Cruz island, Galapagos Island.

Sylvain Cordier / Galapagos giant tortoise (Geochelone nigra porteri), Cerro El Chato, Santa Cruz Island, Galapagos Islands

MYN / Javier Aznar / House gecko (Phyllodactylus sp.) Cerro Seco, Bahia de Caraquez, Ecuador. Meetyourneighbours.net project

MYN / Javier Aznar / False chameleon (Polychrus femoralis) in dry forest, Cerro Seco, Bahia de Caraquez, Ecuador. Meetyourneighbours.net project

MYN / Javier Aznar / Whorltail iguanas (Stenocercus sp) in dry forest, Cerro Seco, Bahia de Caraquez, Ecuador. Meetyourneighbours.net project

Jeff Foott / Opuntia (Opuntia sp) cactus, Cerro Castellan, Big Bend National Park, Texas

Jeff Foott / Cerro Castellan, ancient volcanic peak, Big Bend National Park, Texas

Jeff Foott / Cerro Castellan, ancient volcanic peak, Big Bend National Park, Texas

Andy Rouse / Galapagos Land Iguana (Conolophus subcristatus) walking Cerro Dragon, Galapagos.

Andy Rouse / Volcanic landscape Cerro Dragon, Galapagos. September 2008.

Tui De Roy / El Fatal Giant Tortoise (Chelonoidis sp), a newly described species, Cerro Mesa, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / El Fatal Giant Tortoise (Chelonoidis sp), a newly described species, Cerro Mesa, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / El Fatal Giant Tortoise (Chelonoidis sp), a newly described species, Cerro Mesa, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / El Fatal Giant Tortoise (Chelonoidis sp), a newly described species, with Wacho Tapia, the director of the Giant Tortoise Restoration Initiative and co-author of the new species description, Cerro Mes...

Chris Mattison / Estancia landscape with fence post, near Cerro Castillo, Patagonia, Chile, March 2015.

Tui De Roy / Galapagos blue butterfly (Leptodes parrhasioides) feeding on endemic Macrea flower, Cerro Paja, Floreana Island, Galapagos, Ecuador, June.

Floris van Breugel / Storm clouds and winds of 50mph over Lago Grey, blowing house-sized icebergs across the lake. Cerro Paine Grande visible beyond. Torres del Paine National Park, Chile, June 2014.

Tui De Roy / Long coralline beach typical of north-facing shores, with highlands visible in distance. Cerro Brujo, San Cristobal Island, Galapagos Islands, May 2012.

Tui De Roy / Coastal salt pond bordered by arid vegetation, with Marine iguana (Amblyrhynchus cristatus) swimming across. Cerro Dragon, Santa Cruz Island. Galapagos Islands

Tui De Roy / Long coralline beach typical of north-facing shores, with highlands visible in distance. Cerro Brujo, San Cristobal Island. Galapagos Islands, May 2012.

Russell Laman / Galapagos land iguana (Conolophus subcristatus) basking in the early morning, Cerro Dragon island, Galapagos Islands, Ecuador

Russell Laman / Galapagos land iguana (Conolophus subcristatus) portrait, Cerro Dragon island, Galapagos Islands, Ecuador

Tui De Roy / El Fatal Giant Tortoise (Chelonoidis sp), a newly described species, Cerro Mesa, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / Blue-footed Booby (Sula nebouxii) plunge diving, Cerro Brujo, San Cristobal Island, Galapagos Islands, Ecuador

Tui De Roy / Sally lightfoot crabs (Grapsus grapsus) on basaltic lava shore, with coral beach and old eroded tuff cone. Cerro Brujo, San Cristobal, Galapagos Islands, Ecuador. May 2012.

Tui De Roy / Volcanic caldera with tuff cone and lake, formed by collapse of shield volcano. Cerro Azul, Isabela Island, Galapagos, Ecuador.

Tui De Roy / Volcanic Caldera with Opuntia cactus, Cerro Azul, Isabela Island, Galapagos, Ecuador.

Matthias Breiter / Highway 33 leading to Cerro Torre and Mount Fitz Roy, Patagonia, Argentina

Gavin Hellier / Santa Lucia park and the ornate Terraza Neptuno fountain, Cerro Santa Lucia, Santiago, Chile, 2008

Ben Lascelles / Fasciated Antshrike (Cymbilaimus lineatus). Cerro Azul, Panama.

Oriol Alamany / Hiker on trail to Laguna Torre below Cerro Torre, with Mount Fitz-Roy in the background, Los Glaciares National Park, Patagonia, Argentina. January 2006. Model released.

Colin Monteath / Ninashanca, Rondoy, and Jirishanca peaks with afternoon build-up of clouds, Cerro Yaucha, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Yerupaja Chico, 6121 meters, from Cerro Yaucha, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Cacti near Cerro Cuyoc, Cordillera Huayhuash, Andes, Peru

Tui De Roy / Medium tree finch (Camarhynchus pauper) in Scalesia forest. Cerro Paja, Floreana Island,, Galapagos Islands, Ecuador, June.

Tui De Roy / Medium tree finch (Camarhynchus pauper) foraging in Scalesia forest canopy, by peeling bark in search of insects. Cerro Paja, Floreana Island, Galapagos Islands, Ecuador, June.

Tui De Roy / Medium tree finch (Camarhynchus pauper) in Scalesia forest. Cerro Paja, Floreana Island, Galapagos Islands, Ecuador, June.

Tui De Roy / Medium tree finch (Camarhynchus pauper) in Scalesia forest canopy. Cerro Paja, Floreana Island, Galapagos Islands, Ecuador, June.

Tui De Roy / Galapagos fur seal (Arctocephalus galapagoensis) large territorial bull yawning. South Coast Cerro Azul (Cinco Cerros), Isabela, Galapagos Islands, Ecuador, June.