5 s of calling; from Santa Clara County, Palo Alto, Calif.; 22°C. Dominant frequency 7.1 kHz. Recording by Vickery and Weissman (S85-100, R85-248); used by permission.
5 s of calling; from Santa Clara County, Palo Alto, Calif.; 25°C. Dominant frequency 7.1 kHz. Recording by Vickery and Weissman (S85-100, R85-249); used by permission.