Edwin Giesbers / Red Deer (Cervus elaphus) stag silhouetted in mist, Dyrehaven, Denmark

Philippe Clement / Red deer stag {Cervus elaphus} calling in the mist, Dyrehaven, Denmark

Richard Du Toit / Male Warthogs {Phacochoerus aethiopicus} sparring, Moremi WR, Botswana

Shattil & Rozinski / Bison {Bison bison} on sand dunes, Medano Zapata Ranch, San Luis Valley, Colorado, USA

Richard Du Toit / Giraffes (Giraffa camelopardalis) at dawn by Acacia tree, Moremi Wildlife Reserve, Botswana

Richard Du Toit / Bontebok herd {Damaliscus dorcas} South Africa

TJ Rich / Female Roe deer {Capreolus capreolus} head portrait in flowering field, England, UK, Europe

Bernard Castelein / Water buffalo + calf {Bubalus arnee} Kaziranga NP, Assam, Indi

Bernard Castelein / Gerenuk (Litocranius walleri) feeding up on hind legs, Samburu NP, Kenya, East Africa