Puzzling Partners. The penultimate episode shows how animals strike up unlikely relationships, focusing on humans' interaction with fish-chasing dolphins and honeycomb-seeking birds, and a toad's symbiotic association with a tarantula in the Texan desert.
Director James Honeyborne ; Series producer John Downer (Sl (WI BBC BOOK: Weird Nature, hardback, £16.99 or £13.59 via www.bbcshop.com