Most caterpillars, the larvae of butterflies and moths(Lepidoptera), are herbivorous. Sometimes they are regarded as serious agricultural pest that cause to damage agricultural produce, whereas some species such as Bombyx mori is known to be valued as sources of silk. Even though their major role in the ecosystem, details of biology are poorly known for most species. This study has been carried out to identify larvae and to acquire useful biological information of insect larvae through rearing from 1997 to 2014 in HECRI(Holoce Ecosystem Conservation Research Institution). From 2012 HECRI are carrying out ‘Larvae Identification and Specimen Security of Primary Endemic Moths in Korea Peninsula through Rearing’ supported by National Institute of Biological Resources(NIBR). Of these this study is the list about special caterpillars feeding on the foliage Willow Trees (Salix spp.) Total 143 species belonging to 13 families were collected and identified 69 species belonging to 12 families. Among them Willow Treesdependent monophagous caterpillars are 34 species belonging to 5 families, oligophagous 36 species belonging to 3 families and polyphagous 16 species belonging to 12 families. The dominant family is Geometridae(51 species), second is Noctuidae(35 species) and followed by Notodontidae(21 species).

• Kyoung Nan Park(Holoce Ecosystem Conservation Research Institution(HECRI))
• Kang Woon Lee(Holoce Ecosystem Conservation Research Institution(HECRI), School of Bioresources sciences, Andong National University)
• Hong Yul Seo(National Institute of Biological Resoures, Korea (NIBR))