91av

Lynx carcass after tiger attack

Environment

Battle of the big cats sees tiger hunt and devour a lynx

A snow-covered forest in the far east of Russia was the stage for the cat fight – the first lethal encounter spotted between the two species

Two red ants enjoy sweet nectar exuded by the bittersweet nightshade

Environment

Plant bleeds nectar when attacked to summon ant defenders

A northern Pacific rattlesnake

Environment

Watch a rattlesnake plan attack by clearing path for its strike

Herd of caribou running through snowy forest

Environment

Wolves or bears? Threatened caribou mothers’ catch-22 dilemma

A great egret perching on an alligator

Environment

Alligators help protect bird nests – but still snack on chicks

Stowaway rats have had a catastrophic effect on the bird populations of the island of South Georgia

Earth

Invasive species blamed as second biggest cause of extinctions

great white shark

Environment

White shark’s diet may include biggest fish of all: whale shark

Environment

Moonlight helps plankton escape predators during Arctic winters

Environment

Huge royal albatross chokes to death by swallowing seal shark

Environment

Sharks seen hunting and killing a whale for the first time

Zoologger is our weekly column highlighting extraordinary animals – and occasionally other organisms – from around the world

Environment

Penguins filmed in epic underwater fight stealing a large squid

Environment

Rudolph’s new enemy: The eagles hunting adult reindeer in Norway

Environment

Orcas seen in unique group ambush-and-kill attack on dolphins

Environment

Boa constrictor strangles two marmosets at once in a world first