Abstract: 【OBJECTIVE】Vertical-looking radar(VLR)has allowed long-term automatically monitoring of the altitudinal and temporal dynamics of high-flying insect populations.Using the VLR to investigate whether ground beetles migrate nocturnally through China. and observe the behaviour of migrating insect,such as the orientation and mode of navigation of high-altitude nocturnal migrants;【METHOD】Using the VLR and auxiliary equipment weather information analyzing wind speed and wind direction atmosphere dynamic;【RESULTS】The results show that the carabids density is relative higher from late July to late August.The numbers in light trap catches sudden increase and following sharp drops are obviously.The dots of carabids from the radarscope usually last from 20:00 to 22:00 and sometimes till 04:00. The height of insect flied mainly below 600m and the most insects flied in the height 450m. The number of carabids is positive correlation between vertical-pointing searchlight and the VLR;【CONCLUSION】The result shows that several species of carabids can migrate nocturnally,which can provide good proofs in further study.

Key words: insect migration, radar observation, carabid, flight behaviour