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What does the graph reveal about monarchs in Minnesota?

Source: Monarch Larva Monitoring Project (MLMP)

This graph reveals information about monarchs in Minnesota during the summer of 2011. The data were collected by volunteers of the MLMP project. Volunteers counted monarch eggs and larvae (1st through 5th instars). Use the words below to describe what the graph shows.

first monarchs milkweed last density
eggs larvae instar peak abundant
most least May July June
2011 week month monitoring