David Attenborough presents seven of the most remarkable animal songs found in nature and explores the significance of these songs in the lives of their species.

A story of hope in troubling times. The discovery of a coral reef in Belize and Guatemala, larger than the size of Manhattan, marks a new chapter in understanding corals and fish that depend on each other and in saving coral reefs worldwide.

Witness the story of an extraordinary ecosystem – larger than the state of Texas, and more precious than oil. The heartbeat of this remarkable water world is Niagara Falls. Through the eyes of passionate scientists and naturalists, uncover a complex world forged by stone and powered by water. In this realm, tiny shrews hunt in freezing cold rivers, spectacular shorebird migration unfolds over thundering falls, snowy owls stalk their prey from ice flows, and prehistoric snapping turtles brave a perilous overland journey. All these creatures and many more are part of a remarkable narrative unfolding in one of the most unique ecosystems in North America – Niagara.

Costa Rica's motto is Pura Vida – Pure Life – and this deceptively small country is bursting with some of the most spectacular wildlife and pristine ecosystems in the world. All this diversity thrives, in part, thanks to one surprising little creature: hummingbirds. Venture across Costa Rica's wild and rugged landscapes, from volcanic peaks to coastal jungle to misty cloud forests, and discover the nation's dazzling diversity of hummingbirds. There are more than 50 species of hummingbirds here, and they play an outsize role in maintaining some of the richest and wildest environments on Earth.

Join scientists and researchers across the globe as they go to extraordinary lengths to understand wild dogs. See the groundbreaking discoveries that are crucial to saving this incredible animal family, such as the vets treating captive African wild dogs suffering from "broken heart syndrome."

How do wild dogs survive and thrive in the wild? Discover the secrets to their success, from black-backed jackals that leap skywards to catch prey to agile gray foxes that climb high into the trees.

Meet the many species of canids, the family of wild dogs. They are the most widespread carnivores on the planet.

Take a deep breath and experience the complex world of ocean waters. Get a never-before-seen look at how life underwater co-exists in a marriage of necessity.

Immerse yourself in Scotland's wild highland landscape and meet its long-lived forest keeper, a magnificent Scots pine tree. As one of its longest living species, this ancient tree has witnessed the nation's history across 500 years.

Dive deep into South Texas to meet one of America's most endangered cats: the ocelot. With about 120 known ocelots remaining, the future of the U.S. ocelot population relies on ranchers, scientists and government agencies working together.

Get an intimate look at what makes woodpeckers so special. Explore their unique abilities and intimate stories from around the world. Narrated by Paul Giamatti.

Journey from Canada's Arctic to the boreal forest and discover how polar bears, coastal wolves, lynx and more survive in the North. Timing and seizing opportunity can mean the difference between life and death in this wild and rugged outpost.

Witness the great wildebeest migration in East Africa, the most impressive mass movement of land animals on Earth. Travel with two Maasai guides who expose today's conflict between people and wildlife and share new ideas for co-existence.