What happens next?

How to get rid of bagworms
Begin looking for bagworms during the winter or early spring.
Bagworm egg sacks are brown and one and a half to two inches (3.8 to 5 cm) long. They are covered with dead needles, so they appear more noticeable in contrast to the green deciduous needles at this time.
Bagworm sacks can be very hard to find because they look like pine cones. Look through your pinecones to find variations that may be bagworms.