Time is flying by on this busy, crowded planet as life changes and evolves from second to second. And yet the arc of human lifespan is getting longer: 65 years is the global average way up from just 20 in the Stone Age. Modern science, however, provides a humbling perspective. Our lives indeed the life span of the human species are just blips compared to the age of the universe, at 13.7 billion years and counting. It now seems that our entire universe is living on borrowed time. How long it can survive in any form depends on whether Stephen Hawking’s theory checks out.
The final episode features the summer plankton bloom along the coast of British Columbia and Alaska. In winter, the coastal fjords and inlets are relatively lifeless, and the resident Steller sea lions must dive deeper and further from the coast to catch the widely-dispersed herring. Humpback whales overwinter in the warm Pacific waters off Hawaii, where new mothers suckle their calves. They begin their 3,000 mile journey north in early spring, when the sea lions also give birth to their young. Spring storms are a hazard for the sea lion colonies and some pups are inevitably lost, but these same storms disturb nutrients in the water which, together with the strengthening power of the sun, act as the catalysts for the plankton bloom. Huge shoals of herring arrive to spawn, turning the shallows milky white. The herring sift plankton from the water. In their wake come larger predators, including Pacific white-sided dolphins and killer whales. The latter are filmed attacking a male sea lion. Common murres dive under the herring shoals and pick off the fish from below, pinning them to the surface. Their defence is to form a bait ball, but gulls gathering on the surface attack them from above. The finale to the programme features unique underwater footage of humpbacks engulfing whole bait balls, and reveals their co-operative hunting behaviour called bubble-netting. The diary segment, “Swallowed by a Whale”, looks at the challenges of filming the humpbacks and sea lions underwater.
“if only we understood the chirps, we would be amazed”
Song Birds – part 3 of 3
“if only we understood the chirps, we would be amazed”
Documentary (2002) Nature: A detailed analysis of the reasons and ways that birds communicate. Features robins, blackbirds, finches, hummingbirds, woodpeckers, bell birds, toucans and more …
The fifth instalment is set in Botswana, where the arid plains of the Kalahari are transformed into a lush wetland by the annual flooding of the Okavango Delta. The Okavango River is charged by rain falling in the Angolan highlands, but it is months before the water arrives at the delta. Meanwhile, thousands of animals follow ancient migration routes across the desert, braving dehydration and punishing heat. New elephant behaviour is filmed as they skim their trunks delicately across the surface of a stagnant pool, siphoning clean water from the upper layers. The transformation of the desert into a green oasis is filmed using time-lapse photography, whilst sequences shot with macro lenses show the changes in much finer detail. For the first time, vast clouds of dragonflies are observed emerging to mate and lay their eggs. Larger animals make the most of the sudden riches the new landscape offers. Male hippos plough through the newly-formed waterways and battle for dominance, red lechwe bound through the shallows and huge flocks of wading birds arrive to breed. Elephants and buffalo face one final challenge before they reach the delta; a pride of hungry lions. The lions attack in broad daylight, bringing down an elephant calf. The making-of featurette, “Mission Impassable”, follows the crew as they struggle to cross ever-deepening waters to reach and film the front line of the advancing flood yea.
Along South Africa’s east coast, the right combination of winter weather and ocean currents trigger the sardine run, one of the most impressive events in the world’s oceans. In recent years, the sardine run has become less predictable, for reasons which are still unclear, bringing into jeopardy an entire food chain which it supports. The fourth programme follows the largest gathering of predators on the planet as they hunt down billions of sardines pinned to the cold water along the coast. They include Cape gannets, which time their breeding to coincide with the arrival of the huge sardine shoals. They are filmed at their breeding colony on Bird Island and in super slow motion breaking the surface on their plunge dives. In the water, a super-pod of 5,000 common dolphins also hunts down the sardines. A 15-mile long shoal is located by the predators, and the ensuing feeding frenzy is filmed from the air, the surface and underwater. Dolphins herd the sardines into the shallows, where they come within reach of the diving gannets. Thousands of sharks arrive to join the attack, but the largest predator of all is the lunging Bryde’s whale. “Life on the Run” follows the fortunes of the film crew as they track the hunters. In 2007, the sardine run didn’t happen at all, but their patience was rewarded the following year.
“Fighting” [Series 2] Nature (1990) Trials of Life is still one of the most comprehensive wildlife documentaries ever made. It examines animal behaviour in all its infinite variety and in doing so allows us to witness some of the most enchanting animal personalities, as well as some of the most fearsome.
Leaving parents, searching for food, building a home, finding a mate; each day brings a new test, a challenge for even the fittest and best adapted animal.
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