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On the whole, the first-rate songsters have the most elaborate equipment. The birds with the most syringeal muscles and greatest ability to move the membranes tend to produce the greatest variety of sounds.

— Edward Allworthy Armstrong A Study of Bird Song (1963)

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More quotes by Edward Allworthy Armstrong

Some birds which feed on insects may bring food to the nest more than a thousand times in one day.

Those who would follow Christ must neither be unduly frightened by what is involved, nor rush into commitments which they will be unable to fulfil.

The Marsh Tit, Plain Tit, and some Willow Tits retain territory in winter and pair after occupying territory. Other species which abandon their breeding territories and flock in winter form pairs before they establish territory (Gibb 1956a).

A Study of Bird Song (1963)

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Quote text and notes from Wikiquote: Edward Allworthy Armstrong (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.