Call is a high, thin, insectlike s-e-e-e-e-e-e-e, slightly trilled; in flight display a twangy seet’t´t´u-u-u (Hilty 2003). The most common vocalization is the “advertisement call”, a high rolling or trilled, twaning preeet that covers frequencies between 3.7 and 6.3 kHz. Rates of calling can reach up to 172 calls per hour or almost 1,400 per day. Calling appears to generally peak between 06:00 and 08:00 hrs and between 10:00 and 14:00 hrs. When additional males visit a male’s display log, the advertisement call can turn on a several-second-long trilled currrrtrrr, delivered at lower frequencies on average. Males sometimes give a series of high-pitched seeee notes during the above-canopy portion of the main display (Rosselli et al. 2002). Resident males produce a low grraaahh or cuaak sound in defending their display area from other birds (Rosselli et al. 2002; Kirwan and Green 2012).