So why doesn't an insect just buzz around in the hood until it finds its way out through the circular opening? It is, of course, fooled by the windows. But the inside of the hood has a waxy surface, so that an insect landing on that surface can't grip it and tends to fall into the tubular part of the leaf. Once in the tubular part of the leaf, shown here in sectional view, it's in trouble. Sharp downwardly-pointing hairs, which here merely look like glistening areas, prevent the insect from climbing back up the tube to the hood.
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