Milan Radisics / Aerial shot of the Hafursa glacial river running over black sand, southern Iceland, August 2018.

David Woodfall / Two Little terns (Sterna albifrons) at the nest amongst Black oats (Avena strigosa) growing on shell rich sands Machair, North Uist, Scotland, UK, June.

David Woodfall / Little tern (Sterna albifrons) at the nest amongst Black oats (Avena strigosa) growing on shell rich sands Machair, North Uist, Scotland, UK, June.

David Woodfall / Sequence of strips of cultivated Machair with early shoots of Black oats (Avena strigosa) pushing through the sand. North Uist, Scotland, UK, June.

Ross Hoddinott / Ice on black volcanic sand beach with waves, Jokulsarlon, Southeast Iceland, February.

Ben Cranke / Jaguar (Panthera onca) sitting at night, Mato Grosso, Brazil

Juergen Freund / Seeds and flower from large tropical almond, sea almond, beach almond (Terminalia catappa) against black sand, Sulawesi beach, Indonesia

Andy Sands / Digger Wasp (Cerceris arenaria) carrying large weevil back to burrow, paralysed as food for larvae. London, England, UK, July.

Andy Sands / Digger Wasp (Cerceris arenaria) emerging from burrow where it stores insects, paralysed to feed the wasp's larvae. London, England, UK, July.

Nick Upton / Aerial view of a dense flock of Great Cormorants (Phalacrocorax carbo) resting on a sandbank at Scroby Sands along with a mixed species flock of gulls including Greater black-backed gulls (Larus marin...

Andy Sands / Dormouse (Muscardinus avellanarius) climbing among berries of Black Byrony. Captive. UK, September.

Andy Sands / Bank vole (Clethrionomys glareolus) standing up to feed on Black Bryony berries, Captive, UK.