The larval, or caterpillar, stage typically lasts about 7 weeks. The larvae are most active during the months of May and June. The individual larvae become pupae in late June on into July and remain in this stage for 1 to 2 weeks. Adults emerge in late June through the middle part of July and can persist into August.

How long does a moth pupa take to hatch?

Eggs hatch in 4-10 days. Larvae eat for 2-3 months in favorable conditions or up to 30 months. Metamorphosis in a cocoon can take between 8-10 days (sometimes up to 50 days). Adults usually mate and lay their eggs within 4-6 days of hatching.

What season do moths hatch?

Eggs hatch within 10 days during warm summer months, but take longer in winter — usually up to a month. Most house moths only have one generation per year, and some moth eggs can take longer to hatch. The eggs of the common clothes moth can take up to 18 months to hatch in cold temperatures.