Statistics for 2009
This year the first swifts were spotted around the Museum tower on 27th April. 2009 was not a very successful breeding season in comparison with recent years. Only 67 young were ringed. Nest occupancy was normal, but most pairs raised only one chick due to the wet cold weather in June and July.
See below for the week by week diary.
- 2nd May 2009
Six nest boxes are now occupied. - 9th May 2009
There are 38 nest boxes occupied. - 16th May 2009
There are 58 boxes occupied. - 23rd May 2009
66 boxes are occupied, and 6 eggs have been laid. - 30th May 2009
68 boxes are occupied, and 16 eggs have been laid. - 6th June 2009
Not counted due to wet, windy and cold weather. - 13th June 2009
68 boxes occupied, 19 eggs laid, and 2 young hatched. - 20th June 2009
Not counted. - 27th June 2009
74 boxes occupied, 17 eggs, and 53 young swifts. 27 young have been ringed. - 4th July 2009
65 boxes occupied, 18 eggs, and 58 young. 8 young ringed, and 1 adult identified. - 11th July 2009
65 boxes occupied, 7 eggs, and 68 young. 29 young and 9 adults ringed, and 9 adults identified. - 18th July 2009
65 boxes occupied, 5 eggs, and 64 young. 8 young ringed, and 1 adult identified. - 25th July 2009
37 boxes occupied, 55 young, but no eggs. 7 adults ringed, 12 young to be ringed, and 7 adults re-identified. - 1st August 2009
18 boxes occupied, no eggs, and 25 young. The season is ending, and only a few young remain. - 8th August 2009
9 boxes occupied, no eggs, and 10 young. Most young have left. - 15th August 2009
7 boxes occupied, no eggs, and 10 young. 3 young ringed, and one more to ring. - 22nd August 2009
5 boxes occupied, no eggs, and 6 young. 1 young ringed - the last one. - 29th August 2009
2 boxes occupied, no eggs, and 2 young. 1 adult ringed. - 3rd September 2009
Last swift left today.
The average numbers of young swifts ringed each year over the last 40 years are:
- 1963-1972 36.7
- 1973-1982 70.4
- 1983-1992 100.0
- 1993-2002 99.2
