ML50172

Note contenuto multimediale

NOTES: dawn +0.67hrs; species cut number 11 BNA: Song Initially Peaked Vocalization ("Tieur"). Simple Vocalization ("Tsip"). mf [These calls appear to represent both Initially Peaked Vocalizations (IPVs) and Simple Vocalizations given by a pair of birds (see BNA and Smith, W. J. 1970. Song-like displays of Sayornis species. Behaviour 37: 64-84). All calls given before about 0:26 appear to represent IPVs (moslty "chevron-peaked" forms but with "fully humped" forms given at 0:045 and 0:20-0:25). After 0:26, however, things become more confusing because the IPVs of one bird seem to grade into the Simple Vocalizations of the other, indicating either individual variation in Simple Vocalizations or that one of the birds is giving calls intermediate between Simple Vocalizations and IPVs (see Figure 3 of Smith). Quality changed from 1-2 to 2-1 - CAM - 4 April 2005]. Other Behaviors: Advertise. Habitat: Evergreen Forest, Coniferous Forest, Deciduous Forest, Riparian, Canyon.