There are 10,000 foxes living in London, so rivalries aren't uncommon. However, city foxes often learn how to get along, so they can all eke out a living in the same neighborhood.

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

A dugong in the Philippines has two sets of companions, streamlined remoras and striped golden jacks. The golden jacks grab small shrimps that the dugong stirs up and don’t bother the creature. The remoras, on the other hand, are irritating.

When mating, a male opalescent squid grabs a female and his tentacles flush red. After laying their eggs, all the adults die. Almost everything will eat the dying parents, but the eggs carry toxins.

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.

Dipper chicks are ready to fledge, but an unseasonal downpour transforms the benign river into a raging torrent. Their parents need to coax the chicks out of the nest as quickly as possible to get them to safety.

Capercaillies, birds that live and breed amongst the Scots pines, have an intimate relationship with the tree. The males must compete for the right to mate exclusively with all the hen capercaillies.

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.

Cinematographer Jeff Hogan has filmed many animals all over the world, but, to him, nothing compares to filming busy and beautiful beavers in his hometown of Jackson, Wyoming. He's been filming beavers for over 30 years and has perfected capturing these creatures at work. See how he does it and how important beavers are to the local ecosystem and surrounding wildlife in this episode.

Wildlife filmmaker Ben Masters sets out on a years-long mission to capture high-quality video footage of wild ocelots in Texas. In this behind-the-scenes video for the making of the film "American Ocelot," Masters explains the camera trapping process and showcases never before seen footage of wild American ocelots.

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.

While filming the ocelot kittens, filmmaker Ben Masters compares his experience as a new parent to the mother ocelot. He later brings his infant into the field to "help" with camera trapping.

Camera trapping shows more than just data, it also captures this ocelot family's day-to-day behaviors. These filmmakers became the first people ever to see what it takes for a wild American ocelot to raise her young.

Producer Ann Johnson Prum and cinematographer Mark Carroll travel to western Poland to film the nest of the elusive Black Woodpecker. Working with local Biologist Romuald Mikusek they find a nest over 50 feet high. Using climbing gear Mark ascends the tree to mount cameras to film inside and outside the nest.

Cinematographer Mark Carroll takes us up in a crane to show us how he was able to capture feeding and caching behavior at the Acorn Woodpecker’s eyeview at the Hastings Natural History preserve in Carmel California.

Black woodpeckers in Poland are elusive and have rarely been filmed. A pair of these large, imposing birds make a home in a beech tree, where they feed their hungry chicks.

Acorn woodpeckers love to collect acorns and “tattoo” them into the holes they create in trees. Placing these acorns into trees helps this food last throughout the winter. But acorn woodpeckers aren't the only ones who love acorns, so they need to carefully watch their stash.

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.

The red-backed vole lives beneath the surface of the snow. But there’s one creature that can hear its every move: the great grey owl. And if the owl were not enough of a threat, another predator lurks within the vole's tunnels.

As thousands of belugas arrive, these two polar bears are eager to hunt. However, they have two very different strategies for hunting their prey.