(this snail was found, today, clinging to the leaf about 150cm off the ground on a protruding branch - it was probably dropped there by a bird, unless it climbed up the tree, along a very narrow branch and then on to the leaf!)
This is the cocoon of the Metallic Mechanitis Butterfly Chrysalis from Costa Rica. Mechanitis is a genus of tigerwing (ithomiine) butterflies, named by Fabricius in 1807. They are in the brush-footed butterfly family, Nymphalidae.