Fig. 6. (A) Call parameters of a wild Eptesicus fuscus foraging in an open area as it attacks a flying insect [duration and instantaneous pulse period data computed from original data of Surlykke and Moss (Surlykke and Moss, 2000) with their definitions of echolocation phase]. (B) Expansion of the approach and terminal phases shown in A; points are marked where C. tenera's phonoresponse begins (B) and/or where it is most pronounced (^*), as extrapolated from stimulus pulse periods described in the following studies: 1 (Fullard, 1984); 2 (Fullard et al., 1994); 3 (Ratcliffe and Fullard, 2005); 4 (Barber and Conner, 2006). For both graphs, duty cycles were computed from the original data.