It's not a good idea to touch a butterfly's wings because their wings are covered with tiny scales that help them fly. When you touch their wings, you can accidentally brush off these scales, and the butterfly won't be able to fly well anymore. These scales do not grow back, so it's best to look at butterflies without touching them to keep them safe and happy.
Another way to say this is:
- Butterfly wings are very delicate, and touching them can take off tiny parts that help them fly.
- When you feel a butterfly's wings, you can hurt them by removing the small scales that don't grow back.
- To help butterflies fly strong, it's best to watch them without touching their wings.