Tussock moth egg mass fragment

Typically found on tree trunks, branches, or near wooden structures like houses and fences.

Larvae (caterpillars) are generalist feeders on various deciduous and coniferous trees.

Females are often flightless and lay eggs in a frothy, hardened mass protected by their own body hairs.

Hairs on the egg mass and caterpillars contain toxins that can cause severe skin irritation (urticaria) or rashes in humans.