A large pale yellow/green caterpillar sits inside a folded leaf, which is green and slightly brown. The brown part slightly curls over top of the caterpillar.

Figure 5: Older larvae of A. curvalana, also known as the blueberry leaf tier. Early larvae look similar to early larvae of C. rosaceana.

A large pale yellow/green caterpillar sits inside a folded leaf, which is green and slightly brown. The brown part slightly curls over top of the caterpillar.

Photo by Jocelyn, "osmeterium" on iNaturalist