Kasia and Mati enter a butterfly conservatory in a botanical garden and find themselves surrounded by a world of color, movement, and delicate wings. Among the many butterflies they encounter is one especially remarkable resident: Greta oto, the glasswing butterfly.
Through the children’s questions and discoveries, readers learn what a butterfly conservatory is and why Greta oto’s wings look so different from the brightly colored wings around her. The story introduces the structure behind the butterfly’s transparency, its name, and the ways this unusual insect has inspired scientific curiosity.
The book also follows the complete butterfly life cycle — from egg to caterpillar, chrysalis, and adult — giving children a clear natural-science thread inside a warm, poetic story.
By combining observation with wonder, the book encourages young readers to slow down, look closely, ask questions, and recognize how much science can be hidden inside something as small and beautiful as a butterfly wing.