During field survey, we set up 42 transect lines (18 in
spring, 18 in summer-autumn and 6 in winter) in different
valleys in the reserve. On each side of hillsides in a
valley, only one transect line was established. The length
of transect lines varied (Range: 2.2-7.5 km), but usually
covered all three forest categories. Along these lines,
break-back traps were installed in the afternoon at an interval
of about 5 m, and were checked in the morning on
the next day. Fried corn seeds were used for bait in the
field.