Why do so many of the world's species run with the pack? This video clip looks at the many advantages of following the flock: safety in numbers, the sharing of information on food resources and shelter, cooperation on catching prey. But it also looks at the complications of communal life, like decision-making processes.

The largest occupied bat house and bat barn is on the campus of the University of Florida where human visitors can see the bats prepare for their nightly flight and then watch them take off for an evening of insect eating.

The life cycles of plants, animals, and humans are studied close-up in this outstanding biology program. Narrated film action scenes show plant and animal reproduction, then show the budding of leaves, and the emergence of baby chicks from their shell. The growth stage depicts a caterpillar's metamorphosis into a butterfly, and a tadpole's emergence as a frog. Mature penguins, sheep, ducks, and baboons forage for food, while plants drink in sunlight...

Shot by two filmmakers over fifteen years, this Arctic footage tells the story of a polar bear cub and a walrus pup as they come of age in a melting kingdom. In Australia, the notorious fireweed is threatening the natural habitat of Moreton Bay's endangered green turtles. With the help of Crittercam, researchers explore options for protecting these ancient creatures. Climate change threatens a precious commodity of Hawaii's big island - the Kona coffee...

Strong, fast, and semiaquatic, the hippo is one of Africa's biggest wildlife management challenges. The use of tranquilizer darts is nearly impossible, as a threatened hippo will dash straight for the nearest body of water and dig in. If the animal has been tranquilized, it can drown before the drug wears off, hampering the efforts of wildlife specialists. But Dr. Brady Barr has a new idea - he wants to see if a net will hamper the hippo enough to...

Meet the Transects pride, a Serengeti superpride made of double the number of lions - and lionesses - than the average pride. In south-eastern Tanzania, herds of over a million wildebeest and zebra follow the rains and the new grass north to Kenya. Their journey takes them right into the heart of Transect Territory. For the next weeks, the lionesses will gorge on wildebeest and zebra, having perfectly synchronized the arrival of cubs with the arrival...

Explorer and primatologist Mireya Mayor spends her summers in the rich and biodiverse rainforests of Madagascar tracking down lemurs - performing critical work on two species of highly endangered primates whose habits remain a mystery to biologists: the silky sifaka and the Perrier sifaka. These fascinating lemurs, the smallest of the primates, are known for their large, dark eyes and agile movements through the treetops, where they live, eat, and...

National Geographic delves into the alien world of beetles and reveals the secrets of their success, including their ingenious use of chemicals in love and war.

Chris Packham explores what enables birds of prey to rule the aerial roost. Their ability to dominate their fellow birds in terms of strength, maneuverability and phenomenal speed is down to a combination of anatomical and physiological adaptations. Chris explains the internal workings of the bald eagle's ratchet talons and how sharp eyes and a gyroscopic head enable the goshawk to keep its sight firmly fixed on both its prey and its surroundings...

In the animal kingdom, there's no shortage of creepy, bizarre creatures who crawl on this planet. They range from horned lizards, who shoot blood from their eyes in self-defense to creatures that raise their offspring in the carcasses of dead animals. Some creatures are so bizarre they defy imagination. Komodo dragons use a sixth sense, a 'smell-o-vision' from the roof of their mouth, to seek out prey and cannibal black widow spiders sense movement...