hemlock looper

noun

variants or less commonly hemlock spanworm
: a greenish looper that is the larva of a rather plain buff or gray geometrid moth (Lambdina fiscellaria) of most of North America, that feeds on hemlock and other conifers and oak, and that is sometimes a serious defoliator

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“Hemlock looper.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hemlock%20looper. Accessed 7 Feb. 2023.

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