MD Kern / Palo Alto JR Museum / Black Widow (Latrodectus hesperus) spider walking silhouetted against light, captive.

Niall Benvie,Niall Benvie / Stratus and cirrus clouds above the Isle of Coll. Scotland, August 2012.

Niall Benvie,Niall Benvie / Alto cumulus clouds. Angus, Scotland, August 2012.

Mark Bowler / Cloud forest Alto Mayo Protection Forest Reserve Amazonas Peru - Habitat of Yellow tailed-woolly monkey. June 2008.

Mark Bowler / Aerial view of cloud forest cleared for pasture near to populations of Yellow-tailed woolly monkeys, Alto Mayo, Amazonas, Peru, June 2008

Gavin Hellier / The Geisler Gruppe - Geislerspitzen, Trention, The Dolomites / Alto Adige. Italy

Morley Read / Panning shot of bromeliads growing in the species rich area of Alto Paquisha, a Tepuy in the Cordillera del Condor, Ecuador. (non-ex)

Juan Carlos Munoz / Gandara River flowing through Mediterranean forest. Veguilla, Alto Ason, Soba Valley, Cantabria, Spain. May 2019.

Juan Carlos Munoz / Mediterranean forest in spring, trees with fresh leaves and blossoming, aerial view. Veguilla, Alto Ason, Soba Valley, Cantabria, Spain. May 2019.

Juan Carlos Munoz / Oak (Quercus sp) trees coming into leaf in field, tractor tracks in grassland, aerial view. La Gandara, Alto Ason, Soba Valley, Cantabria, Spain. May 2019.

Juan Carlos Munoz / Oak (Quercus sp) coming into leaf within grassland, aerial view. Campina, La Gandara, Alto Ason, Soba Valley, Cantabria, Spain. May.

Juan Carlos Munoz / Mortero de Astrana, karst landscape with cave, aerial view. Astrana, Alto Ason, Soba Valley, Cantabria, Spain. April 2019.