Questions About Catching and Handling Butterflies and Moths Where can I find butterflies and moths? How can I catch a butterfly or moth? Where can I buy caterpillars? How can I raise a caterpillar? Can you damage a butterfly by handling it? Are any caterpillars dangerous to hold? Gently handling a Royal Walnut Moth (Citheronia regalis)Kids! Learn more about participating in local field trips and getting a discount on a butterfly collecting kit through the Outernet Project of The Lepidopterists' Society. Zoe, dressed and ready to collect butterflies and moths.