Jack Dykinga / Prickly pear cactus (Opuntia engelmanni) stressed and dying as a result of drought, Tucson Mountains in evening light, Saguaro National Park, Arizona 2021

Michel Roggo / Aerial view of the front of the Sermeq Kujalleq Glacier, Greenland, entering the Kangia Ilulissat Icefjord full of icebergs. The icebergs are produced by the Sermeq Kujalleq Glacier, one of the fastes...

Michel Roggo / Gornerglacier (or Gornergletscher) near Zermatt, at an altitude of about 2,500 meters at the glacier terminus. This lower part of the glacier will melt away in a few years. Since 2007, the glacier has...

Nick Garbutt / Herds of White-bearded wildebeest (Connochaetes taurinus albojubatus) waiting to cross the Mara River. Northern Serengeti National Park, Tanzania (early September).

Nick Garbutt / Light-mantled sooty albatross (Phoebetria palpebrata) flying over Fortuna Glacier with rainbow, Fortuna Bay, South Georgia. (digitally stitched image) similar to 01296715

Nick Upton / Portrait of wildlife photographer Nick Upton on a coastal shoot in North Cornwall, UK. Model released. 2017

Michel Roggo / Dugdale Glacier with meltwater draining from the Admiralty Mountains into Robertson Bay, North Victoria Land, Antarctica. Aerial shot from helicopter, February 2017. Photographed for The Freshwater Pr...

Edwin Giesbers / Two Adelie penguins( Pygoscelis adeliae) on blue iceberg, Antarctica

Edwin Giesbers / Stag beetle (Lucanus cervus) males fighting at dusk in oak wood, the Netherlands, June

Nick Garbutt / Adult humpback whale (Megaptera novaeangliae) diving in deep water channel. Great Bear Rainforest, British Columbia, Canada. COP26 Countdown Photo Competition 2021 Finalist. (digitally stitched image)

Doug Gimesy / Portrait of photographer Doug Gimesy

Jen Guyton / Mozambican wildlife veterinarian Mercia Angela on her daily walk with Boogli, a female Cape pangolin confiscated as infant by Gorongosa's law enforcement team. Boogli's mother had already b...