big tropical butterfly cocoons hanging on a wooden beam, insect metamorphosis

abdomen background beam big bug bugs butterflies butterfly caterpillar caterpillars chrysalis chrysalises closeup cocoon cocoons creature cycle cyclus development entomology exotic fauna growth hanging hatch hatching holometabolism insect insects large larva larvae lepidoptera life macro metamorphic metamorphism metamorphosis monarch nymph nymphs pupa pupation silken specie species stage transformation tropical two wooden zoology