Michael & Patricia Fogden / Green-spotted Swallowtail (Graphium tynderaeus) butterfly, Tangkoko Batuangus Reserve, Indonesia

Ingo Arndt / White Rhinoceros (Ceratotherium simum) males facing off, Lake Nakuru, Kenya

Ingo Arndt / Monarch (Danaus plexippus) butterfly feeding on nectar of Goldenrod during migration, East Coast, USA

Ingo Arndt / Monarch (Danaus plexippus) butterflies gathering to drink water and take up minerals, Michoacan, Mexico

Tim Fitzharris / Common Sunflower (Helianthus annuus) group showing symmetrical seed heads, North America

Ingo Arndt / Ctenophore (Beroe cucumis) showing typical symmetrical combs made of cilia, Weddell Sea, Antarctica

Ingo Arndt / Edible Frog (Rana esculenta) with reflection, Germany

Winfried Wisniewski / Eland (Taurotragus oryx) pair, Masai Mara, Kenya

Sebastian Kennerknecht / Tule Elk (Cervus elaphus nannodes) females cleaning themselves, Point Reyes National Seashore, California

Christian Ziegler / Greater Bulldog Bat (Noctilio leporinus) hunting at night, Panama

Tom Vezo / Grey Pansy (Junonia atlites) butterfly, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Chinese Oak Silk Moth (Antheraea pernyi), Tucson, Arizona