What do butterflies do for the winter?

Dave and Ada have been attending story time at the Outdoor Campus (once a month) where they listen to stories and get to make a "project" after the stories. Ada was telling Benjamin and me what she learned. She learned about butterflies, foxes, birds, etc. She was so proud of her bird feeders that she made with daddy. When Dave asked her what butterflies do for the winter she said "they go on vacation to somewhere warm." Benjamin stopped what he was doing and said "there is no where warm around here." Dave and I couldn't help but laugh!