Jack Dykinga / Rainbow over Long Canyon with fall coloured Cottonwood (Populus) trees against canyon walls, Burr Trail, Grand Staircase-Escalante National Monument, Utah, USA, October 2018.

Jack Dykinga / Waterfall over sandstone with cottonwood tree, Long Canyon , Burr Trail, Grand Staircase-Escalante National Monument, Utah, USA. October.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) (T27) walking on bund / dam wall trail. Kanha National Park, Central India. Camera trap image.

SCOTLAND: The Big Picture / Lone Scot's pine tree (Pinus sylvestris) and star trails with the north star, Abernethy forest, Cairngorms National Park, Scotland, UK.

Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) and desert golds (Geraea canescens) carpet the sandy washes beneath the Calumet Mountains at dawn. Mojave Trail National Monument, Mojave Desert, Califo...

Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) and desert golds (Geraea canescens) carpet the sandy washes beneath the Calumet Mountains, under the Milky Way. Mojave Trail National Monument, Mojave D...

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) female 'Princess' walking along a trail carrying her daughter 'Putri' aged 2 years on her back. Camp Leakey, Tanjung Puting National Park, Central Kalimantan...

Jeff Vanuga / Night stars over Yosemite Falls, Yosemite National Park, California, USA, May 2014.

Andy Rouse / Bengal tiger (Panthera tigris tigris) with tourists watching from cars, Ranthambore, India

David Pattyn / Alpine ibex (Capra ibex) adult males resting on trail, in mountain landscape. Alps, Aosta Valley, Gran Paradiso National Park, Italy. September.

Kirkendall-Spring / Hikers on the trail to Three Fingered Jack, Mount Jefferson Wilderness, Duschutes National Forest. Oregon, USA, July 2014. Model released.

John Abbott / Low angle view of trees in the Hoh Rainforest, Hall of Mosses Trail, Olympic National Park, Jefferson County, Washington, USA, June.