Fig. 2. Four examples of sustained, continuous flight (flight time 12–39 min) for four N. hybridus individuals and subsequent post-flight cooling (12 min). The horizontal line represents T_thx=T_a and the vertical line denotes cessation of flight. The filled diamond indicates the mean thoracic temperature measured during the flight. Mean flight temperatures were 33.5°C (A), 31.5°C (B), 33.01°C (C) and 27.83°C (D). Mean flight temperature for post-flight T_thx taken via the `grab and stab' method was 29.9±3.1°C. T_thx, thoracic temperature; T_a, ambient air temperature.