Canoeists Etienne Stott and Tim Baillie have been commemorated on a Royal Mail stamp after their unexpected triumph in the canoe slalom.
Victorious Britons who win the top accolade at London 2012 will be commemorated with a series of special stamps and have a post box painted gold in their home towns to celebrate their wins.
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Crisp, sunny days and colder nights
Their numbers swelled to about 5,000 as they set out walking towards the Mexican town of Tapachula.
The unusual creature, officially named Enypniastes eximia, has only ever been filmed before in the Gulf of Mexico.