I think people need not fear planting trees on their premises that will be favourites with caterpillars, in the hope of luring exquisite te moths to become common with them. I have put out eggs, and released caterpillars near the Cabin, literally by the thousand, and never have been able to see the results by a single defoliated branch. Wrens, warblers, flycatchers, every small bird of the trees are exploring bark and scanning upper and under leaf surfaces for eggs and tiny caterpillars, and if they escape these, dozens of larger birds are waiting for the half-grown caterpillars, for in almost all instances these lack enough of the hairy coat of moss butterfly larvae to form any protection. Every season I watch my walnut trees to free them from the abominable 'tent' caterpillars; with the single exception of Halesidota Caryae, I never have had enough caterpillars of any species attack my foliage to be noticeable; and these in only one instance. If you care for moths you need not fear to encourage them; the birds will keep them within proper limits. If only one person enjoys this book one-tenth as much as I have loved the work of making it, then I am fully repaid.
End of Project Gutenberg's Moths of the Limberlost, by Gene Stratton-Porter