The eels are highly prized by the locals These Solomon Islanders hand feed them, not to fatten them up for dinner but to encourage them to stick around By scavenging on whatever's decaying here the eels clean the islanders' precious pools of drinking water And over time, the honorary guests have become tame One day, these adult freshwater eels will return to the sea to spawn after which they'll die For now, they're as good as pets Away from the coast, animals are thin on the ground The Solomons have only a quarter of the reptiles and birds that New Guinea has For mammals like echidnas and kangaroos the water proved too great a hurdle But some mammals did make it here When it comes to reaching new islands flying must surely have been the easiest way to get there But the 60 miles between New Guinea and the Solomons still proved a formidable challenge for many winged creatures With their four-foot wingspans giant fruit bats succeeded where other fliers failed