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

Ole Jorgen Liodden / Arctic tern (Sterna paradisaea) attacking an Arctic Fox (Vulpes / Alopex lagopus) protecting its nest site, Spitsbergen, Svalbard, Norway. Highly commended, MAMMALS, GDT 2011 competition

Juergen & Christine Sohns / African Wild Dog (Lycaon pictus) group attacking Cape Warthog (Phacochoerus aethiopicus), Tswalu Game Reserve, South Africa

Ingo Arndt / Mountain Lion (Puma concolor) hunting Guanaco (Lama guanicoe) male, Torres del Paine National Park, Patagonia, Chile, sequence 3 of 12. Joint winner of the Mammal Behaviour Category of the Wildlife Ph...

Marie Read / Canada geese (Branta canadensis) two during territorial fight in early spring, Ithaca. New York, USA

Marie Read / American avocets (Recurvirostra americana) two during aggressive (territorial) encounter, Bear River Migratory Bird Refuge, Utah, USA, May.

John Chan / Western gulls (Larus occidentalis) attacking an Elegant tern (Thalasseus elegans) with a broken wing, Southern California, USA, April.

Ingo Arndt / Mountain Lion (Puma concolor) hunting Guanaco (Lama guanicoe) male, Torres del Paine National Park, Patagonia, Chile, sequence 10 of 12

Ingo Arndt / Mountain Lion (Puma concolor) hunting Guanaco (Lama guanicoe) male, Torres del Paine National Park, Patagonia, Chile, sequence 4 of 12. Highly commended in the Wildlife category of the Nature?s Best P...

Ingo Arndt / Mountain Lion (Puma concolor) hunting Guanaco (Lama guanicoe) male, Torres del Paine National Park, Patagonia, Chile, sequence 1 of 12

Ingo Arndt / Mountain Lion (Puma concolor) hunting Guanaco (Lama guanicoe) male, Torres del Paine National Park, Patagonia, Chile, sequence 2 of 12

Daniel J. Cox / Gray Wolf (Canis lupus) killing female Elk (Cervus elaphus) crossing river, Alum Creek, Yellowstone National Park, Wyoming, sequence 3 of 4