Cased caterpillar/larvae?

Cased caterpillar/larvae?

Observation - Cased caterpillar/larvae?. Description: This was crawling along a gravelly grassy track that was in a lake complex. The case was about the size of a small grain of rice.

This was crawling along a gravelly grassy track that was in a lake complex. The case was about the size of a small grain of rice.