During large outbreaks, debris and frass from feeding caterpillars can be disruptive to outdoor activities. Spongy moth caterpillars defoliate trees, leaving trees vulnerable to diseases and other pests, which may lead to tree mortality. Most often feeds on the leaves of oak and aspen but can also be found on hundreds of other plant species. Or - download the MISIN smartphone app and report from your phone - /tools/apps/#home ABOUT THIS SPECIES Habitat: Use the Midwest Invasive Species Information Network (MISIN) online reporting tool Photo courtesy of Haruta Ovidiu, University of Oradea,. Spongy moth male (dark) and female (white). Wings are white to cream with wavy black markings. Female moths are larger than males and do not fly.Male moths' wings have a wavy pattern of brown to dark-brown and span 1.5 inches.Leaf debris and small, round frass found under trees are indications of gypsy moth infestation.Mature caterpillars are 1.5 to 2 inches in length.Caterpillars are hairy, with a yellow and black head and 5 pairs of blue spots, followed by 6 pairs of red spots.Spongy moth caterpillars emerge from tan, fuzzy egg masses in April and feed on leaves through late June.*Established in Michigan* Identification:
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