Table 2.

Parameters characterizing the peripheral directionality in the four species of field cricket.

	Optimum of mean directional tuning [kHz]	Max. IIDs of mean standardized tuning curve [dB]	Optimum of directional tuning in individuals [kHz] [Range of variation]	Mean width of directional tuning 5dB below optimum ± SD [Hz] [Range of variation]	Mean CF of male signals ± SD [kHz] [Range of variation]
Gryllus bimaculatus	4.5	7.7	4.5 (± 0.23) [4-5.1]	1395 (± 488) [400-2200]	4.7 (± 0.21) [4.3-5.2]
Gryllus campestris	4.8	17.4	4.6 (± 0.56) [3.6-5.7]	567 (± 602) [100-1900]	4.7 (± 0.2) [4.3-5.1]
Teleogryllus oceanicus	4.4	11.2	4.2 (± 0.27) [3.6-4.5]	991 (± 591) [200-2500]	4.8 (± 0.21) [4.3-5.4]
Teleogryllus commodus	4.0	13	3.9 (± 0.3) [3.4-4.5]	833 (± 559) [200-1800]	4.0 (± 0.15) [3.8-4.2]