Nature Production / Bombardier Beetle (Pheropsophus jessoensis) protecting itself by ejecting a boiling, noxious chemical spray, Nagasaki, Japan.

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

Vincent Grafhorst / Hippopotamus (Hippopotamus amphibius) spraying water from nostrils, Khwai River, Botswana

Ernie Janes / Potato (Solanum tuberosum) crop irrigation, Norfolk, UK, July 2011

Anup Shah / African elephant (Loxodonta africana) spraying mud, low angle shot, Masai Mara National Reserve, Kenya. March

Anup Shah / African elephant herd (Loxodonta africana) spraying mud with trunk, Masai Mara National Reserve, Kenya. December

Anup Shah / African elephant (Loxodonta africana) spraying mud, Maasai Mara National Reserve, Kenya, February

Tony Heald / African elephant (Loxodonta africana) at waterhole with trunk in air after spraying itself with water, herd of Zebra drinking in the background, Etosha National Park, Namibia, June

Kevin Schafer / Amazon River Dolphin (Inia geoffrensis) jumping, Rio Negro, Amazonia, Brazil

Andy Rouse / Hippopotamus (Hippopotamus amphibius) fighting with water spraying out of its mouth, Katavi NP, Tanzania

Andy Rouse / African elephant (Loxodonta africana) bull spraying mud at camera, Savute, Botswana (non-ex)

Andy Rouse / African elephant (Loxodonta africana) spraying water from trunk, bathing, Marakele NP, South Africa