Swift Departures
10,000 Birds
JULY 26, 2024
The first eggs are usually laid at the end of May or sometimes in the first week of June, but this can vary depending on the weather. Both sexes incubate, with the eggs taking an average of 19 or 20 days to hatch. This book is based on a long-running study of Swifts nesting in a tower at Oxford University’s Museum of Science.
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