2025 Swallow Nest Box Status

Statistics of Swallow Nest Boxes at Buttertubs West Marsh in 2025.

Number of boxes: 30
Number of boxes with eggs: — (–%)
Number of eggs laid: —
Mean clutch size (range): — (–)
Number of eggs hatched (% eggs hatched): — (–%)
Number of nestlings banded (% nestlings banded): — (–%)
Number of females banded: —
Number of males banded: —
Number fledged (% nestlings fledged): — (–%)
% eggs to fledglings: –%
Fledging rate (young per pair): —

Summary statistics of Tree Swallow nesting productivity at Buttertubs West Marsh during 2020-2024, and 10-year average.

Parameter 2020202120222023202412-year
Average
Number of boxes3636363630
Number of boxes with eggs (% of boxes with eggs)31
(86%)
27
(75%)
20
(56%)
24
(67%)
25
(83%)
21
(67%)
Number of eggs laid203194131138154128
Mean clutch size (range) 5.0
(1-7)
5.1
(3-7)
5.7
(2-7)
5.3
(3-6)
5.5
(2-7)
5.1
Number of eggs hatched (% eggs hatched)158
(78%)
119
(61%)
116
(89%)
120
(87%)
104
(68%)
95
(73%)
Number of nestlings banded (% nestlings banded) 101
(64%)
88
(74%)
115
(99%)
97
(81%)
82
(79%)
79
(84%)
Number fledged (% nestlings fledged)85
(54%)
50
(42%)
102
(88%)
83
(69%)
62
(60%)
60
(66%)
% eggs to fledglings42%26%78%60%40%48%
Fledging rate (young per pair)2.11.34.43.22.22.5