989-371 - Juvenile grey heron (Ardea cinerea) in flight, escaping from an aggressive rival in a territorial dispute, Rutland Water, Rutland, England, United Kingdom, Europe
832-374097 - Leopard (Panthera pardus) behind a rock, hissing, Tshukudu Game Lodge, Hoedspruit, Greater Kruger National Park, Limpopo Province, South Africa
832-373966 - Two Arctic foxes, white foxes, polar foxes or snow foxes (Vulpes lagopus formerly Alopex lagopus), adults fighting, social behaviour, in the snow, Montana, North America, USA
832-374099 - Leopard (Panthera pardus) behind a rock, hissing, Tshukudu Game Lodge, Hoedspruit, Greater Kruger National Park, Limpopo Province, South Africa
832-369871 - Mackenzie Wolf, Eastern wolf, Canadian wolf (Canis lupus occidentalis) in the snow, omega wolf not accepting lower rank, baring teeth, aggressive
832-373965 - Two Arctic foxes, white foxes, polar foxes or snow foxes (Vulpes lagopus formerly Alopex lagopus), adults fighting, social behaviour, in the snow, Montana, North America, USA
832-369874 - Mackenzie Valley Wolves, Canadian Timber Wolves (Canis lupus occidentalis) in the snow, fight for rank order, alpha female, right, reprimanding a young wolf, in front of the pack
832-369875 - Mackenzie Valley Wolves, Canadian Timber Wolves (Canis lupus occidentalis) in the snow, fight for rank order, alpha female, right, reprimanding a young wolf, in front of the pack
465-3193 - Dominant male proboscis monkey (Nasalis larvatus) in aggressive display to other males, Labuk Bay Proboscis Monkey Sanctuary, Sabah, Borneo, Malaysia, Southeast Asia, Asia
857-70212 - The Cuban Knight Anole (Anolis equestris) is the largest anole in the world. It is native to Cuba, but has been introduced to South Florida. Growing to a length of 13 to 20 inches it is fiercely territorial and aggressive to anything that enters its territory