"One of the main highlights of a day spent on Mainau Island is a visit to Germany’s second largest butterfly house. Get a feeling of the tropics as you walk around the exotic landscape with its unique vegetation.Admire the tropical butterflies (approximately 80 different species) from Africa, Asia, Central and South America as they flutter around in the Butterfly House kept at 90% humidity and temperatures between 25°C and 30°C.
Sometimes you can also see moths with a wingspan of up to 30cm. 70% of all the butterflies are imported from special breeding farms in their country of origin. They arrive as pupae every week on Mainau Island. The other 30% of the butterflies breed and lay eggs on the forage plants in the Butterfly House. You can see the butterfly’s entire lifecycle from egg to caterpillar and pupae to the emergence of the adult butterfly.... " Source http://www.mainau.de/schmetterlingshaus0.html