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Fig. 4. An example of a 24-h observation period, illustrating the thermal
environment a beetle may experience throughout the day and how beetle activity
corresponds to operative temperatures. Beetle activity is defined as the
number of beetles caught while flying into a trap in addition to beetles seen
flying in the vicinity of the traps but not landing. An asterisk indicates one
observation where an N. investigator individual was found walking on
the ground near a can.