Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) mud bathing, Tsavo Conservation Area, Kenya. Editorial use only.

Anup Shah / African Elephant (Loxodonta africana) smelling, Masai Mara, Kenya

Ann & Steve Toon / Elephants (Loxodonta africana) at waterhole drinking at night. One spraying water from trunk, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.

Dave Bevan / Male Great spotted woodpecker (Dendrocopos major) entering nest hole and leaving with a faecal sac, Carmarthenshire, Wales, UK, June.

Christophe Courteau / African elephants (Loxodonta africana) swimming across Chobe River, trunks raised above surface for breathing, Chobe National Park, border between Botswana and Namibia.

Yashpal Rathore / Asiatic elephant (Elephas maximus) young female play fighting. Jim Corbett National Park, India. 2014

Andy Rouse / African Elephant (Loxodonta africana) mother and calf in rain, wallowing in mud. Maasai Mara, Kenya, Africa. September.

Cheryl-Samantha Owen / African elephant (Loxodonta africana) close up of trunk, Amboseli National Park, Kenya.

Inaki Relanzon / Keeper interacting with young African elephant (Loxodonta africana) after feeding it, David Sheldrick African Elephant Orphanage. Nairobi National Park, Nairobi, Kenya.

Inaki Relanzon / Keeper examining African elephant calf's (Loxodonta africana) trunk, David Sheldrick African Elephant Orphanage. Nairobi National Park, Nairobi, Kenya.

Anup Shah / Elephant (Loxodonta africana) calves playing together, Maasai Mara National Reserve, Kenya. December

Anup Shah / Elephant (Loxodonta africana) calves playing together . Maasai Mara National Reserve, Kenya. December