Morley Read / Slow motion clip of a group of male Mallards (Anas platyrhynchos) competing violently to mate with a single female, Cornwall, England, UK, May 2018. (non-ex)

Konrad Wothe / Showreel of Male Chimpanzees (Pan troglodytes) attacking the alpha male of their troop, Mahale Mountains National Park, Tanzania.

Konrad Wothe / Male Chimpanzees (Pan troglodytes) attacking the alpha male of their troop, Mahale Mountains National Park, Tanzania.

Staffan Widstrand / Two Svalbard reindeer (Rangifer tarandus platyrhynchus) fighting; antlers shedding velvet; Spitsbergen, Svalbard, Norway, September

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) feeding on Brydes whale carcass (Balaenoptera brydei), Seal Island, False Bay South Africa.

Andy Rouse / Cheetah (Acinonyx jubatus) catching gazelle, Maasai Mara, Kenya, Africa

Loic Poidevin,Loic Poidevin / Dalmatian pelicans (Pelecanus crispus) squabbling over fish, Lake Kerkini, Greece, February

Morley Read / Slow motion clip of a group of male Mallards (Anas platyrhynchos) competing violently to mate with a single female, Cornwall, England, UK, May 2018. (non-ex)

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) violent fight between two sub adult tigers probably siblings for Gaur (Bos gaurus) calf kill. Kanha National Park, Central India. Camera trap image.

Tui De Roy / Nazca booby (Sula granti), adult killing chick. Genovesa Island, Galapagos.

Tui De Roy / Nazca booby (Sula granti), two males fighting. Genovesa Island, Galapagos. Sequence 1/6.

Tui De Roy / Nazca booby (Sula granti), two males fighting. Genovesa Island, Galapagos. Sequence 2/6.