This exhibition, an annual favorite, features up to 500 live, free-flying tropical butterflies from the Americas, Africa, and Asia. The butterflies are housed in a vivarium that approximates their natural habitat, includes live flowering plants that serve as nectar sources, and features controlled artificial light, temperature, and humidity. Featured species include iridescent blue morpho butterflies, striking scarlet swallowtails, and large owl butterflies. Text panels located immediately outside the vivarium offer information about the evolution and life cycle of butterflies, including explanations of mimicry, diversity, and butterflies’ important role in conservation. Whitney Hall of Oceanic Birds, second floor.