Bug Convention

Asked July 23, 2019, 12:53 PM EDT

Found this group on a milkweed plant in our North Oaks garden this morning. Are these caterpillars, and why so many? Thanks. Tarmo Kubits

Ramsey County Minnesota milkweed tussock moth caterpillar

1 Response

They are young milkweed tussock moth caterpillars. There are so many because they just hatched, but they stay together as long as possible. They will eventually eat much of your milkweed. See https://www.canr.msu.edu/news/milkweed_tussock_moth_larvae_feed_on_common_milkweed, http://bugoftheweek.com/blog/2014/8/22/the-other-milkweed-caterpillar-milkweed-tussock-moth-ieuchaetes-eglei or https://www.butterfliesandmoths.org/species/Euchaetes-egle