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Only 1 year is required for these beetles to complete their life cycle. They overwinter as grubs that may become active on warm winter days. They increase their activity in the spring, and in June pupate in earthen cells several centimeters underground. The pupal stage lasts about 18 days; adults appear in July and August. In mid-summer, adults lay eggs underground in earthen balls. Each female lays 60 to 75 eggs over a span of about 2 weeks. When the egg is first laid, it is pearly white and elliptical (1.5 mm by 2.1 mm). It gradually becomes more spherical as the larva inside develops. About 18 days after the eggs are laid, they hatch into small, white grubs. The newly hatched larva is 8 mm long and grows to a length of about 40 mm. Whitish with a brownish-black head, the grub has conspicuous brown spiracles along the sides of its body. The larvae molt twice before winter. The third larval stage lasts nearly 9 months, after which pupation occurs. At night, the larvae may be found on the ground crawling on their backs. This curious form of locomotion is peculiar to the green June beetle.The brown pupa, approximately the same shape as the adult, becomes metallic green just before the adult emerges. It is about 15 mm long and 15 mm wide.back to

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14y ago
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9y ago

The June bugs are early in IL this year they are buzzing about my windows driving my cat's a big bonkers

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9y ago

Man y June bugs die because they are exposed to light for too long. They also only have a life cycle of about a year.

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14y ago

Usually around June, or July in Northern states.

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11y ago

When do June bugs come out

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13y ago

they want to be on time

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Q: Do June bugs only come out in June?
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