EEB386H1 Study Guide - Final Guide: Centrocercus, Bird Vocalization, Courtship Display
23 Apr 2015
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Starlings: learn songs from other species and learn new songs throughout life, sound for communication. Hummingbird, manakins, woodcocks, gruffed grouse: vibrate feathers to create buzzy noises, typically during courtship display. Gruffed grouse: drumming sound by rapid wing movement. Sage grouse: popping sounds when expel air from oesophageal air sacs during courtship. Pigeons: clap wing tougher in flight. Woodpecker: pound beak against hollow tree trunk, metal guttering to create drumming sound. Palm cockatoos: use drumstick from branch and beat it against hollow trunk during courtship. Songs are specific and function in species recognition. Diverse in terms of context: may be for survival, or feeding, alarm, contact, flight, and even pre-copulatory calls. Produced by males in breeding seasons, but in some cases, some birds sing all year long. Usually in diurnal rhythm (late night), primarily in the early morning and at dusk. We analyzed the sonograms in class (pitch vs time).
