vocalizations calls vs. songs whistled versus harmonic mobbing
Post on 21-Dec-2015
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Vocalizations
Calls vs. Songs
Whistled versus Harmonic
mobbing
Juvenile White-crowned
SparrowExposed to 2 song models
What do I sing?
Song sparrow Model song
White-crowned model song
Variation in song learning in song birds
1) Short sensitive period vs. life-long learners2) Repertoire of single song vs. 1000s of syllables (Brown Thrasher)3) Produce faithful copy of song model vs improvise (Sedge Wrens)4) Need exposure to conspecific song vs develop song in isolation (Grey Catbird)5) Copy tutor song if it fits template vs copy anything! (Mockingbirds)
Fernando Nottebohm
Avian song system
HVC bigger in malesEnlarges in spring with song and with repertoire size
As a result repertoire size mayIndicate male quality duringdevelopment/immune system
“it was widely held that brain cells, once lost, could not be replaced. …work on the song system changed the prevailing view.”
Song Learning =LMAN, Area X, DLM
Song production =Hvc, RA, etc
Auditory input =Field L
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