Eri Silkworm comes from the caterpillar found in many parts of Thailand. Eri Silkworm is the only completely domesticated silkworm. Eri Silk moth is born as a silkworm. It spins open-ended cocoons as it morphs into beautiful moths. Eri Silkworms are fed using cassava leaves. After they are fed by cassava leaves. The caterpillar has a small spinneret on its lip, through which the silk emerges.