Luke Massey / Yellow baboon (Papio cynocephalus) holds her dead youngster. South Luangwa NP, Zambia.

Jordi Chias / Short-finned pilot whale (Globicephala macrorhynchus) female carrying dead calf, with others swimming nearby, Los Gigantes, South Tenerife, Canary Islands, Atlantic Ocean, May

Jordi Chias / Short-finned pilot whale (Globicephala macrorhynchus) female carrying dead calf, diving down from surface, Los Gigantes, South Tenerife, Canary Islands, Atlantic Ocean, May

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) female with dead baby, killed during fight between females. Berenty reserve, Madagascar

Cyril Ruoso / Ringed-tailed lemur (Lemur catta) female with dying baby, killed during fight between females. Berenty reserve, Madagascar

Charlie Summers / African elephant (Loxodonta africana) mother standing guard over her stillborn calf. Tarangire National Park, Tanzania.

Charlie Summers / African elephants (Loxodonta africana) around mother as grieving for stillborn calf laying in the roadway. Tarangire National Park, Tanzania

Christophe Courteau / Two Burchell's zebras (Equus quagga burchellii) looking at dead pregnant female that died due to complications whilst giving birth, Etosha National Park, Namibia.

Christophe Courteau / Group of Burchell's zebras (Equus quagga burchellii) gathering around a dead pregnant female that died due to complications whilst giving birth, Etosha National Park, Namibia.

Christophe Courteau / Burchell's zebra (Equus quagga burchellii) looking at and sniffing dead pregnant female that died due to complications whilst giving birth, Etosha National Park, Namibia.

Christophe Courteau / Group of Burchell's zebras (Equus quagga burchellii) gathering around and sniffing a dead pregnant female that died due to complications whilst giving birth, Etosha National Park, Namibia.

Christophe Courteau / Two Burchell's zebras (Equus quagga burchellii) looking at and sniffing dead pregnant female that died due to complications whilst giving birth, Etosha National Park, Namibia.