Camilo De La Uz, 10, of Washington, D.C., and Cecily Shavelson, 8, of Homer, Alaska, search for tent caterpillars within their web-like home in a tree in Lyme, N.H., on Tuesday, Aug. 14, 2018. Tent caterpillars are regarded as pests and populations fluctuate year-to-year, reaching peak population every 9 to 16 years. (Valley News - August Frank) Copyright Valley News. May not be reprinted or used online without permission. Send requests to permission@vnews.com.