Monday 24 May 2021
Following another week of wet and windy conditions, the swifts are late in settling down to breed. This week there are 21 nests showing signs of activity. Many of these nests are being renovated by the birds but there are 20 eggs visible spread between nine nests, plus two adults sitting tight in other nests. These presumably have at least one egg and most likely two or three eggs, so we can say between 22 and 26 eggs present.
The next two weeks are critical to whether or not it will be a good breeding season. Cold, wet weather often causes swifts to either kick eggs out of the nest or just to desert entirely, whereas warm, dry weather encourages more pairs to breed and rear two or three eggs through hatching to fledging. Time will tell.