Research suggests that the early-morning phenomenon known as the 'dawn chorus' may be songbirds' vocal warmup period before maximum song performance during the day.
As spring springs, the mornings become light earlier, and old friends, winged, leafy and otherwise, return for another growing season — the season’s morning alarm clock is gearing up.
The early — and sometimes, it seems, way too early — daily chorus may be songbirds’ vocal warmup period as they prepare for maximum song performance during the day. Using detailed metrics, the researchers identified vocal-performance changes in Adelaide’s warblers as the birds progressed through their dawn voice exercises in the dry forests of southwestern Puerto Rico.
The measures quantify how fast an individual bird can sing, how complex its song pattern is, and the gaps between the notes. The birds’ performances were slowest first thing in the morning, increased rapidly during the dawn chorus, and levelled off afterward. As the warblers’ performance improved, the silent gaps between each note became shorter and shorter.
Dawn Chorus Songbirds Vocal Warmup Research University Of Lethbridge Adelaide's Warblers
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