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Caterpillars reach impressive sizes. When they have completed their growth, they can measure up to eight and sometimes even 10 cm long. Although a species is associated with a wide variety of host plants, the caterpillar feeds only the species on which it was born.
Photo: Insectarium de Montréal (René Limoges)
In Quebec, we see the great saturniids from mid-May to late June. These butterflies live a few days, the time it takes to reproduce.