Tanya Hoare <ta.h...@btinternet.com>: Mar 25 09:48AM
hi graham
I don't know if this 'counts' as a large colony in a single building, but we
have 35 pairs breeding in our own cottage in Cumbria. Over a third are in
natural nests in the eaves, the rest are in Cambridge system bricks or S
bricks and 4 pairs in boxes.
regards
Tanya & Edmund
ta.h...@btinternet.com
<https://www.facebook.com/Sedbergh-Community-Swifts-105860945339945> (1)
Sedbergh Community Swifts | Facebook
From: swiftsloc...@googlegroups.com
<swiftsloc...@googlegroups.com> On Behalf Of Dick Newell
Sent: 22 March 2026 14:04
To: swiftsloc...@googlegroups.com
Cc: Graham Knight <gpk...@gmail.com>
Subject: Re: [SLN] Largest Swift colonies on a single building?
Hi Graham,
The last time we checked, St Mary's Ely had 58 pairs in 96 nest boxes.
I think St John's Bury St Edmunds has a similar number in 60 nest boxes.
My own church, All Saints' Landbeach has 22 pairs in 60 nest boxes
At one point, St Mary's St Neot's had 48 pairs in 60 nest boxes - down to 4
pairs last year thanks to a Kestrel.
I don't know of any large single building colones near here.
Dick
On Sun, 22 Mar 2026 at 13:52, Graham Knight <gpk...@gmail.com
<mailto:gpk593@gmail.com> > wrote:
Dear all
I am looking for examples of the largest Swift colonies on a single
building. I am aware of the Oxford NHM tower (53 breeding attempts in 2025)
but am interested in other similar or larger colonies
In East Hertfordshire, we have been surveying the wonderful Swift colony at
Redwood Court in Bishop's Stortford, where the Swifts nest in the many slots
in the brickwork under the eaves - photos attached. This is an old Victorian
Hospital building which was converted to flats in the 1990's. The Swifts
have probably nested here for many years, but it was only "discovered" as a
significant colony in 2023.
Since then, Gavin Vicary (NE Herts Swift Group) and I have carried out a
great deal of survey work to establish the size of the colony. In 2025 we
observed Swifts using 47 of the slots, and in the last 3 summers, we have
seen them using a total of 70 different slots.
It is not the easiest building to survey, but we think it has 60-70 nesting
pairs.
Unfortunately the management company wants to carry out redecorating works
this summer. We are trying our best to engage with them and try to defer any
scaffolding until the Swifts have gone.
Any details of other large single-building colonies would help us to put the
importance of the site into context
Best wishes
Graham Knight
Sawbridgeworth Swifts
Facebook - Sawbridgeworth Swifts
<https://www.facebook.com/profile.php?id=61552550656671>
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