Eastern tent caterpillar (ETC) (Malacosoma americanum) silk nests are now large enough and the accompanying defoliation evident enough to be very noticeable in Ohio. The nests are located in branch forks and they reveal that population densities and caterpillar developmental rates vary widely across the state. I've driven long stretches recently without seeing a single nest on trees flanking the highway only to round a curve or top a hill to arrive in an ETC wonderland.
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