How are the overwintering egg masses characterized?
Answer
They are coated in a protective covering of buff or yellowish hairs
The egg masses are laid in clusters containing hundreds of eggs, coated with hairy material that gives them their characteristic spongy texture.

Related Questions
Why was the common name recently changed to Spongy Moth?What is the scientific name associated with the Spongy Moth pest?In which location and approximate year was the Spongy Moth accidentally introduced to North America?What was the original intended use for the Spongy Moth when it was brought to North America?Which life stage causes the most significant destruction to North American forests?What pattern of spots distinguishes the Spongy Moth caterpillar?Which group of trees do Spongy Moth caterpillars show a strong feeding preference for?What consequence typically results from repeated defoliation by the Spongy Moth over multiple years?How are the overwintering egg masses characterized?What is a key difference regarding flight capability between adult male and female Spongy Moths?What is a primary management technique targeting Spongy Moths during the winter?What is the name of the fungus that acts as a significant natural biological control agent against the caterpillars?