Efforts to get an orangutan to quit smoking, new species of frog named after Prince Charles, Floridians protest release of genetically-modified mosquito, fruit flies learn arithmetic, and yet another feathered-dinosaur find.

This video from NATURE explores how three distinctive animals in Cuba--the smallest bird in the world, the smallest frog in the Northern hemisphere, and the country’s famous painted snails--interact with Cuba's wildlife and ecosystems.

(Airs Sunday, April 18) More than a third of all amphibians have already been lost, and more are disappearing every day. A fungus called chytrid has been identified as the major culprit.

(Premieres Sundays April 4 and April 11) New technologies reveal what's behind incredible "moments of impact" - when animals come into contact with each other and the world around them.