Table 1. The investigated times and routes of this study.

No. Date Investigation routes
1 9 Apr. 2018 Hwanseongul
2 24 Apr. 2018 Daegeumgul - Summit - Mt. Jigag - Gwinemi - Hwanseongul
3 14 May 2018 Gwinemi - Mt. Jigag - Gwinemi
4 28 May 2018 Gwinemi - Mt. Jigag - Hwanseongul
5 28 May 2018 Gwinemi - Hwanseongul
6 28 May 2018 Gwinemi
7 28 May 2018 Gwinemi - Hwanseongul - Daegeumgul
8 26 June 2018 Gwinemi
9 17 Jul. 2018 Gwinemi - Hwanseongul
10 20 Aug. 2018 Gwinemi - Hwanseongul - Daegeumgul
11 20 Aug. 2018 Gwinemi - Mt. Jigag - Summit - Yesuwon
12 10 Sep. 2018 Gwinemi - Hwanseongul - Daegeumgul
13 10 Sep. 2018 Yesuwon - Gubusilyeong - Summit - Hwanseongul
14 10 Sep. 2018 Hwanseongul
15 31 Oct. 2018 Gwinemi
16 13 Jul. 2019 Gwinemi - Mt. Jigag - Summit - Yesuwon
17 14 Jul. 2019 Gwinemi - Hwanseongul - Daegeumgul
18 7 Aug. 2020 Daegeumgul - Summit - Mt. Jigag - Gwinemi - Hwanseongul
19 8 Aug. 2020 Gwinemi - Mt. Jigag - Hwanseongul