Spectacular flowers call for spectacular bees. Euglossin bees pollinate orchids, and the level of specialization is high: an orchid is pollinated by only a few species of bee, and one species of bee pollinates only a few species of orchids. Put out a plastic bag with eucalyptus oil, and these guys come zooming as soon as the sun comes out.
According to locals, there used to be a ton of these bees in Monteverde; nowadays they’re relatively hard to find. If euglossin bee species are gone, so are probably their favorite orchid species. Since the orchids grew high in the trees, no one may have ever even seen them before they disappeared.