Overview:As the largest island in the Caribbean, Cuba is host to spectacular wildlife found nowhere else on the planet: from the jumping crocodiles of the Zapata swamp to the world's tiniest hummingbird, from thousands of migrating crabs to giant, bat-eating boas that lie in wait for easy prey. Decades of a socialist, conservation-minded government, American embargoes and minimal development have left the island virtually unchanged for 50 years. As international relations ease, what will become of this wildlife sanctuary?