Voracious • 2017 • episode "3/5" • Big Pacific

52:09

Every year the black cap warbler undertakes a mysterious migration. This discreet journey covers thousands of kilometers and triggers puzzles that scientists are still trying to understand today. Thanks to cutting-edge technology, we will track the black caps on their journey.

3/4 • Secret Migrations • 2019 • Nature

56:56

Revealing the strategies predators use to hunt for prey in the big blue.

4/7 • The Hunt • 2015 • Nature

53:37

This programme focuses on birds. The feather is key to everything that is crucial about a bird: it is both its aerofoil and its insulator. The earliest feathers were found on a fossilised Archaeopteryx skeleton in Bavaria. However, it had claws on its wings and there is only one species alive today that does so: the hoatzin, whose chicks possess them for about a week or so. Nevertheless, it serves to illustrate the probable movement of its ancestor. It may have taken to the trees to avoid predators, and over time, its bony, reptilian tail was replaced by feathers and its heavy jaw evolved into a keratin beak.

8/13 • Life on Earth • 1979 • Nature

53:37

This instalment is the first of several to concentrate on mammals. The platypus and the echidna are the only mammals that lay eggs (in much the same manner of reptiles), and it is from such animals that others in the group evolved. Since mammals have warm blood and most have dense fur, they can hunt at night when temperatures drop. It is for this reason that they became more successful than their reptile ancestors, who needed to heat themselves externally. Much of the programme is devoted to marsupials (whose young are partially formed at birth) of which fossils have been found in the Americas dating back 60 million years.

9/13 • Life on Earth • 1979 • Nature

58:43

In a remote corner of southern Arabia one mountain range holds a remarkable secret. Swept by the annual Indian Ocean monsoon, the Dhofar mountains become a magical lost world of waterfalls and cloud forests filled with chameleons and honey-badgers. Off-shore rare whales that have not bred with any others for over 60 thousand years and green sea turtles come ashore in their thousands, shadowed by egg-stealing foxes. Heat-seeking cameras reveal, for the first time ever, striped hyenas doing battle with Arabian wolves. Meanwhile local researchers come face-to-face with the incredibly rare Arabian leopard.

2/3 • Wild Arabia • 2013 • Nature

22:30

Zebra stripes vary subtly between the different species but there is one group of animals that has evolved colourful patterns of seemingly infinite variety, the butterflies. In this episode David looks at two examples of animal patterns that have bedazzled and baffled science for a long time, and uses modern tools to unlock their secrets.

S1E5 • Natural Curiosities • Nature