Klaus Echle / Red Fox (Vulpes vulpes) walking along a fallen trunk, silhouetted in misty forest. Black Forest, Germany, November.

Sven Zacek / Meandering Loobu River with surrounding meadows and woodlands, aerial view. Lahemaa National Park in Northern Estonia in Laane-Virumaa, Estonia. May 2017.

Ingo Arndt / Long eared owl in tree {Asio otus} Hessen Germany

Ingo Arndt / Flock of Bramblings (Fringilla montifringilla) perched together in branches. It's estimated that four million individiuals return to roost during winter in Black Forest, Germany. February.

Ingo Arndt / Flock of Bramblings (Fringilla montifringilla) roosting together in branches. It's estimated that four million individiuals roost in the Black Forest, during winter months, Germany. February.

Ingo Arndt / Flock of Bramblings (Fringilla montifringilla) taking off / landing on branches. It's estimated that four million individiuals roost in the Black Forest, during winter months, Germany. February.

Ingo Arndt / Flock of Bramblings (Fringilla montifringilla) in flight, an estimated four million return to roost overwinter in Black Forest, Germany, March.

Ingo Arndt / Tropical rainforest / cloud forest scenic, Monteverde National Park, Costa Rica

Ingo Arndt / Trees covered with snow, Brocken, Harz NP, Germany. Sunrise sequence

Ingo Arndt / Trees covered with snow, Brocken, Harz NP, Germany

Ingo Arndt / Trees covered with snow Sunrise sequence, Brocken, Harz NP, Germany

Francois Savigny / Wild gaur male grazing {Bos gaurus} Bandhavgarh NP, Madhya Pradesh, India