When animals are the subject, most people associate Australia with lovable koalas and leaping kangaroos. But an even more distinctive aspect of Australian wildlife is its abundance of animals -- from snakes and spiders to a host of marine life forms and at least one mammal -- that use venom to defend themselves, attack prey, and in some cases help digest food.

They are among the most reliable witnesses to a crime — expert in their testimony and bulletproof in their account. Yet they never utter a single word. They are the animals, plants, and insects that are being recruited by a special breed of forensic scientists to solve the most seemingly impenetrable of crimes.

This program features the Kogi tribe who live in the Sierra Nevada de Santa Marta in Columbia. They are pre-Columbian peoples, and consider themselves as the elder brothers of humankind. They insist that it is the modern world, the younger brothers, who are destroying the harmony of life on earth.

The enigmatic subjects of NATURE: The Urban Elephant, Asian elephants are losing territory to the inevitable process of deforestation. Industrialization all over Asia has hurt the mahouts, or elephant drivers, so that the trained elephants and their riders are being driven into major cities such as Bangkok to earn a meager living receiving donations and food from curious tourists.

Examines the variety of plants and animals living in the Sargasso Sea, a gigantic floating bed of seaweed near Bermuda.

The activities of an elusive female leopard are traced over a two-day period on the hot plains of Africa.

Explores the selection process among different species for choosing a mate, whether it’s for life or just for the day.

Cats command our attention and our devotion. These fascinating creatures have been perplexing people for thousands of years.

THE FOUR BILLION YEAR WAR explains how both conflict and cooperation have helped shape the species that today populate our world. And it profiles the winners and losers in this epic evolutionary contest — from the massive dinosaurs who disappeared long ago to the humble bacteria that have survived for billions of years virtually unchanged.

A chronicle of hippopotamus life along the banks of Zambia's Luangwa River includes footage of males fighting over territory; females protecting their young; the hippo's importance to river ecology; and societal rituals involving the head male of the pod. Mark Hamill narrates.

Patricia Clarkson narrates this look at the relationship between the sycamore fig tree and the tiny fig wasp, which is so small it could fly through the eye of a needle. The trees, which flourish in Kenya, produce fruit that provides nourishment to more wildlife than any other tree in Africa, but without the pollination the wasp provides, that might not occur. The documentary also examines other creatures that make the trees their homes, including gray hornbills (one of Africa's largest birds).

TOOTHWALKERS presents extremely rare under-the-ice footage that reveals a complex and potentially dangerous side to this huge and often mysterious mammal.

For centuries, the Tuareg people have braved the brutal Sahara to trade in salt, a precious cargo once worth its weight in gold. In this episode of AFRICA, Adam Ilius,salt production a young boy of nine, crosses hundreds of miles of desolate and dangerous desert on his first trans-Saharan salt caravan. After months of traveling, will Adam make it to Bilma, Niger to sell the caravan's salt for necessary food and clothing? Or will the shifting sands of the desert spell disaster for this tenacious group?

Scientists have discovered that natural poisons and venoms contain chemicals that can be used to create drugs for treating everything from chronic pain to cancer.

Amid the glamour of Hollywood, a woman finds herself on a transformative journey as she nurtures wounded hummingbirds, unraveling a visually captivating tale of love, fragility, healing, and the delicate beauty in profound acts of kindness.

How does such a seemingly passive life form accomplish the complex task of reproduction?

Ironically, the powerful, dedicated canines profiled in Sled Dogs: An Alaskan Epic are little more than mutts. They are mixed-breed huskies that have endurance.

Filmed in the mountains of Montana, this poignant, engrossing chronicle focuses on an extraordinary stallion, whose life has been recorded since his birth in the wild in 1995 by Emmy-winning filmmaker Ginger Kathrens.

Underdogs tells the poignant story of two misfit dogs whose lives were turned around by people who saw their potential for greatness.

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A story of surprise and revelation. A wildlife cameraman spends his time during the coronavirus pandemic lockdown filming the bees in his urban garden and discovers the many diverse species and personalities that exist in this insect family.

An intimate portrait of Sir David Attenborough's life, from his boyhood days as a fossil hunter, through his early days as a BBC host, to his revered status as the foremost natural history presenter.

"Jaguar: Year of the Cat" follows the predator in its native rain forests of Belize. Included: a pair stalk turtles, peccaries and armadillos; scenes of the habits of their animal neighbors, including toucans and ocelots.

Exploring pigs, described by host George Page as “the world's most cosmopolitan characters,” with a focus on their adaptability to a variety of environments. Included: pigs as pets; hunters stalking a “bearded” pig in Borneo.

Tales of canine loyalty to humans, including segments illustrating how dogs detect people buried by avalanches, enhance the lives of prison inmates and offer "therapy" for seriously ill youngsters. Also: the use of dogs to assist people with disabilities; dog scouts and couriers.