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Gypsy Moth - Gypsy moth pupae.

Gypsy Moth Pupae

Gypsy Moth - Male gypsy moth.

Male Gypsy Moth

Gypsy Moth - Female gypsy moth.

Female Gypsy Moth

Images courtesy of the USDA Forest Service

Egg masses appear as 1.5 inch (4 cm) tan or buff-coloured hairs on tree trunks, outdoor furniture or the sides buildings.

Gypsy moth caterpillars change appearance as they grow.  Young caterpillars are black or brown and about ¼ inch (.6 cm) in length.  As they grow, bumps develop along their backs along with coarse, black hairs.  Each of the 11 sections of a developed caterpillar will have two coloured spots, the first five pairs, blue, and the last six, red.  Mature caterpillars can be as long as 2 ½ inches (6.35 cm).

Gypsy moths are seen only in mid-summer.  Males are grayish brown and can fly; females are larger, whitish with black marks and cannot fly.

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