Fig 7. Outer vane of the 10^th primary feather tip of T. furcata pratincola.

(A) Photograph of the leading edge of a 10^th primary of T. furcata pratincola taken at 0.95–0.97 of the vane length. Note the denticulate leading edge. Note also that the barb shafts are straight or bent towards the rachis. (B) Frontal view of a three dimensional reconstruction of the outer vane. The tips of three barbs are presented in this reconstruction. Note that the Y_f-Z_f plane is perpendicular to the view present here, and can, therefore, not be seen. Note the tilt of the barbs. h.r.: hook radiates, b.r.: bow radiates