Making Sex Pay
The dowdy peahen chooses the ornamental peacock as her mate. Male elephant seals use their bulk and weight to fight for a harem of females.
A hombill walls herself up for weeks and depends entirely on a devoted mate for food. Why such variety?
James Gould , a Professor of Biology at Princeton University, has an explanation for all mating habits - including our own.
Every animal is in search of a bargain from the opposite sex. Every animal is doing its best to make sex pay. Music composed by GEOFFREY BURGON Film editors
PAUL GARRICK . MICHAEL GOLDSMITH Producer CHRISTOPHER LA FONTAINE Horizon editor
ROBIN BRIGHTWELL
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