Table 1.

Contrasts of general response characteristics to different playback stimuli. (Asterisks denote significant results from Mann–Whitney U-tests.)

measure	result	stimuli
		eagle (n=10)a versus leopard (n=10)a	pyow (n=12) versus hack (n=14)
number of calls	U	11	27.5
	Z	−2.958	−2.914
	pexact	0.002**	0.003**
duration of male call series (s)	U	29	60
	Z	−1.587	−1.234
	pexact	0.123	0.231
call rate (number of male calls per call bout length)	U	23	46
	Z	−2.041	−1.955
	pexact	0.043*	0.053
latency to the first male call (s)	U	21	53
	Z	−1.443	−1.594
	pexact	0.167	0.118
proportion of pyows in the entire call sequence	U	10	12
	Z	−3.414	−4.038
	pexact	0.001***	<0.001***
proportion of pyows in the first 10 calls	U	10	12
	Z	−3.472	−4.172
	pexact	0.001***	<0.001***

^aSample sizes of eagle and leopard responses were increased to 10 using additional recordings collected by A.M.S. under identical methodology.