Luna moth caterpillar

Life cycle:

Based on the climate in which they live, luna moths produce differing numbers of generations. In Canada and northern regions, they can live up to seven days and will produce only one generation per year. These reach adulthood from early June to early July. In the northeastern United States around New Jersey or New York, the moths produce two generations each year. The first of these appear in April and May, and the second group can be seen approximately nine to eleven weeks later. In the southern United States, there can be as many as three generations. These are spaced every eight to ten weeks beginning in February.

Females lay 400–600 eggs, 4–7 eggs at a time, on the underside of leaves, and they incubate for eight to thirteen days. The moths will lay more eggs in a favorable climate. - excerpt from Wikipedia