Reference numberCLP/15i/54
TitleExtract of a letter, regarding swallows in winter from Armand Dubourdieu
Date21 September 1697
DescriptionDubourdieu describes the way in which swallows (Hirundinidae) 'drown' during the winter, remaining in the water until spring. He describes how the birds rest together in the water, one on top of another.

Subject: Zoology / Ornithology / Natural history

Written by Dubourdieu in Stockholm

Read to the Royal Society on 27 October 1697
Physical descriptionInk on paper
Access statusOpen
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