“…The use of the harmonic technique, whether it is as a direction-finder (e.g., Mascanzoni & Wallin, 1986) or as direction and range finders (e.g., Riley et al, 1996), will not provide access to all the types of flight that are part of the life system of the CPB. Mark and release techniques can measure average distances travelled (e.g., Follett et al, 1996) but provide no information on travel time, number of interrupted flights, height of flight, and the general effect of landscape on flight behaviour (Osborne et al, 1999;Capaldi et al, 2000). Mark and release techniques can measure average distances travelled (e.g., Follett et al, 1996) but provide no information on travel time, number of interrupted flights, height of flight, and the general effect of landscape on flight behaviour (Osborne et al, 1999;Capaldi et al, 2000).…”