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Unformatted text preview: Song Sparrow • Calls are innate, mean danger or congregate • Song is learned and is highly structured – notes, “syllables”, phrases that repeat • Songs have regional variation (dialects) • Songs must be learned during a critical period • Songs have a fixed meaning Bird Song Summary ■ Like human language ➤ Duality of patterning (individual notes are meaningless, sequence is all important) ➤ Dialects ➤ Babbling and critical period ➤ Controlled by left side of brain (although mechanisms completely different) ■ Different from human language ➤ Only males sing (females will if injected with testosterone!) ➤ Lots more variation than in human language (different species!) ➤ Designed for communication over distance ➤ Meanings very limited (to attract a mate, to repel trespassers) – Here I am; Let’s mate; There’s a predator nearby; I found food; I found water; The nest is over here . .....
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- Fall '09
- human language, Vervet Eagle