A pair of bird watchers had to be rescued when they got stuck in mud while taking pictures at a river estuary in Thailand. The Norwegian duo were on holiday and ventured out with their cameras at first light on Friday to take pictures on mudflats in the southern Thai province of Krabi. But the mud was less firm than they imagined and the nature lovers found themselves sinking fast. Fortunately, they were spotted by a construction worker, named by local media as Chat Ubonchinda, who managed to free them. But the rescue was far from easy as the mud was too thick to pull them out. The builder had to lie down so the pair could pull themselves against his body, with one even crawling across his back.