Sky Nature HD Wednesday

From the inescapable gang mentality of mating male dolphins, to the female geladas who always get the last word, discover how certain alphas use teamwork to their advantage.

Often, small alphas use big weapons to remain on top. Welcome to a world of stink bombs, needlelike choppers, razor-sharp beaks and killer talons

TJ the capuchin causes mischief when he joins the new Chilean arrivals. Orangutan Amy is pregnant, and chimps from Hananya's group get their teeth cleaned

The team must make an important decision concerning the safety of a chimp group when alpha male Hananya continues to exhibit violent behaviour

The story of Palau, an island nation in the Pacific which in 2009 created the world's first shark sanctuary for more than 100 species

Summer brings challenges and opportunities on the African plains, as many animals are able to feast, while others battle it out in search for food and water in the merciless heat

Sri Lanka's parched lowlands, a forest clearing that is a peaceful home to monkeys, deer and wild boar - and a prime hunting ground for crocodiles

After Beni's date with the dentist, it's back to class as usual, but life is about to turn from bad to worse for the gentle giant

The flat savannahs of the Llanos face seasonal extremes that push life to the brink. In this unforgiving land, animals don't get a second chance

TJ the capuchin causes mischief when he joins the new Chilean arrivals. Orangutan Amy is pregnant, and chimps from Hananya's group get their teeth cleaned

The team must make an important decision concerning the safety of a chimp group when alpha male Hananya continues to exhibit violent behaviour

The story of Palau, an island nation in the Pacific which in 2009 created the world's first shark sanctuary for more than 100 species

Summer brings challenges and opportunities on the African plains, as many animals are able to feast, while others battle it out in search for food and water in the merciless heat

Sri Lanka's parched lowlands, a forest clearing that is a peaceful home to monkeys, deer and wild boar - and a prime hunting ground for crocodiles

The documentary about the Luangwa Valley considers how the life of every animal is linked to the vastly different seasons - the wet and the dry

The flat savannahs of the Llanos face seasonal extremes that push life to the brink. In this unforgiving land, animals don't get a second chance

TJ the capuchin causes mischief when he joins the new Chilean arrivals. Orangutan Amy is pregnant, and chimps from Hananya's group get their teeth cleaned

The team must make an important decision concerning the safety of a chimp group when alpha male Hananya continues to exhibit violent behaviour

Tanzania's Lake Manyara National Park, an area enriched by ancient volcanos which provides a variety of habitats for life to thrive

The wildlife presenter explores the magic of Ireland's western islands, beginning with Rathlin, Malin Head and Inishtrahull, where he sees basking sharks and dolphins

The flat savannahs of the Llanos face seasonal extremes that push life to the brink. In this unforgiving land, animals don't get a second chance

The documentary about the Luangwa Valley considers how the life of every animal is linked to the vastly different seasons - the wet and the dry

After Beni's date with the dentist, it's back to class as usual, but life is about to turn from bad to worse for the gentle giant

The two wild fortresses that protect the vulnerable animals - a remote island shielded by saltwater and a hilltop citadel surrounded by a predator-proof barrier

Tanzania's Lake Manyara National Park, an area enriched by ancient volcanos which provides a variety of habitats for life to thrive

The wildlife presenter explores the magic of Ireland's western islands, beginning with Rathlin, Malin Head and Inishtrahull, where he sees basking sharks and dolphins

The story of Palau, an island nation in the Pacific which in 2009 created the world's first shark sanctuary for more than 100 species

Summer brings challenges and opportunities on the African plains, as many animals are able to feast, while others battle it out in search for food and water in the merciless heat