Monday, 5 October 2015

New houses for people - and for Swifts

A new social housing development by T J Evers, on behalf of Sanctuary Group, of twenty affordable houses in Northumbria Close, at the northern end of the village of Haddenham in Cambridgeshire is now complete. As it is a greenfield site, with much of natural history interest in the surrounding area, the developers agreed to incorporate biodiversity enhancements in their plans.

An environmental impact assessment of the site produced a record of Great Crested Newt. However, in consultation with Haddenham Conservation Society, a provision was written into the recommendations written by the eco-consultants, MLM, and subsequently into the planning approval requesting the installation of nestbox accommodation for bird species known to nest in buildings. In the event, this meant primarily Swifts.

Jake Allsop and Dick Newell of Action for Swifts, visited the site and had constructive talks with the building contractors, T J Evers. We offered them a simple solution: to incorporate nestboxes made from clay airbrick liners inside the brickwork of the buildings, concealed behind slip bricks (a ~1 inch slice of brick) with an entrance cut in it, in most cases on the gable end. This is a low cost solution, and easy for the bricklayers to implement. [We have used clay airbrick liners on other projects here and here]

Example of a finished entrance
In this project, the exterior slip brick with its entrance slot is  mounted on the external face of the nest cavity. In this way, the provision of nesting accommodation is achieved without compromising either the fabric or the appearance of the building. 

Fourteen nestboxes were installed. Even in August and during the ongoing building work, workmen reported seeing birds entering some of the boxes. We know that one was a Great Tit, and the others were House Sparrows, but earlier, there was one report of a Swift seen in the vicinity of a box. We will need to monitor the situation closely next season, and if we can persuade one or two house owners to play attraction calls, there is a good chance of enticing Swifts.

Unfinished nest-box, showing the exposed
airbrick liner before covering with slip bricks

We learned something on this project: The size of the access hole to the nest cavity is critical. The recommended dimensions are Length 65-70mm, Height 30mm, but we know that at 30mm, Starlings can squeeze in, so we recommended a height of 28mm (tolerance 27mm-29mm). (Swifts will get into a hole as low as 25mm, but as they wriggle to get in, they may be vulnerable to predators).

In the event, there was some variation in the size of access holes, which is understandable. It suggests that in future, the boxes and their entrances should be pre-fabricated.

The building contractors were entirely enthusiastic and supportive, and it is to be hoped that they will take the message with them to future housing developments that they work on. We also hope that the message from Northumbria Close Haddenham will be heard by other developers across the land. It's the only way we can be sure that there will be Swifts in our skies in years to come.

The nest box entrance is barely visible in this gable end

Tuesday, 29 September 2015

Swifts on BBC One Songs of Praise

On July 17th 2015, a BBC film crew visited the Worlington Swift Festival at All Saints Church, for a piece to be included in the religious program 'Songs of Praise' on 27th September. 

You can read the history of the Worlington project up to 2012 on this blogpost and about the last Worlington Swift Festival in 2013 here. In 2013, there were 11 pairs in the belfry, then 20 in 2014 and now 26 in 2015.

Wednesday, 23 September 2015

The News from Tashkent 2015

Our Uzbeki friends, Pavel and Elena, began rescuing and rehabbing a few years back, and now their work has grown into a major operation. Operating in difficult circumstances, with very little help, with very few resources, and a limit of time (as they both have demanding jobs), they manage to rehab a large number and variety of species, mostly birds, but some mammals as well. By June this year, for example, they had already taken in over 90 Swifts.

by Jake

Pavel & Elena
Why do they do it? It is clear that rescuing a Swift nestling here or an injured Sparrow there will make no difference to the population of those species. Some people would even argue that it's a waste of time and resources, which could be better spent on other aspects of conservation. But that is to miss the point. We rescue and care for individual animals because - at least this is my view - in so doing we show a “duty of care” for our environment and its denizens. We do more than that: we set an example to others.

White, Black, Bosnly and Shugar
Whatever their philosophy of rehabilitation, Pavel and Elena are totally devoted to every one of their patients. To start with, they give each one a name - Swifts this year included Bosnly, Cobra, Elm, Emilion, Gold, Shugar and White; their Nightjars were Agatha and Ruby; their Scops Owls Solomon and Babayka; their Roller was Jora; and their two beautiful Red-rumped Swallows were Kiki and Melissa. 

Ruby the Nightjar

Most of these, and many others, were successfully rehabbed and released back into the wild. Inevitably, there are cases where the rehab is touch and go, for example, the Scops Owl Babayka, which was brought in with an old wing injury. Against all the odds, Elena and Pavel nursed it back to health and, after two nailbiting months, were able to watch leap from their hand to fly strong and free again.

Solomon the Scops Owl
They also offered to take an injured Eagle Owl, but the people who had it decided to keep it (it was later put to sleep). Swifts, of course, are their main business. By the end of August, Elena sent us a report on the Swift year so far: 

Spring was beautiful, the weather was nice. First fallen Swift chick was 18 days old! We didn't get any fallen “babies” without feathers and with closed eyes. Thankfully! But in June the weather became incredible hot, and Swifts began to jump from roofs. The last wave of swifts was the worst, with more fatalities. We had 120 birds this season, maybe we will have more later…”

Their success is amazing when you remember that they are operating on a shoestring. They depend on donations and the occasional help of friends. They can save petrol money if people who find an injured animal will bring it to them instead of expecting them to go and collect it. To have built aviaries and other keeping cages in these circumstances is nothing short of miraculous. 

Jora the Roller
To have produced posters and other publicity materials to spread the message of their work is equally so. They are getting more and more well-known for their work, and are reported occasionally in the local press. They now have plans to create their own website, with local friends to help them. And they are never short of plans for the future: already, Pavel has started on the building of a greenhouse and a big outside aviary for birds of prey.

What is perhaps most heartening is the way Pavel and Elena have become part of the international network of Swift enthusiasts and Swift rehabbers. A special mention of Ulrich Tigges, who has done so much to support them over the last few years.They are in regular correspondence with other rehabbers: ours - Judith and Deborah - and others such as Christiane Haupt in Frankfurt. 

Kiki the Red-rumped Swallow
They also get occasional visitors to Tashkent, for example, two zoologists from Spain visited them this summer. And, of course, they stay in touch with everyone by email. Their regular reports are a joy to read.

Pavel and Elena, in a word, go from strength to strength: they are the most professional of amateurs, and they deserve all our support.

Monday, 31 August 2015

Internal Swift nest boxes in a Belgian school

This project demonstrates a technique that has been used several times in the UK, but using commercial, off-the shelf products. Though possibly more expensive, the end result looks very professional. It uses identical products to this project. Whereas in this country, most projects have attempted to make the entrances 'invisible' (e.g. these four projects: 123 and 4), this project has some similarity to the very successful project in Fulbourn Cambs where the entrances were made conspicuous (5).
A heartening feature is the enthusiastic collaboration of the various stakeholders -  municipal officers, local councillors, building contractors and other interested parties. Without this kind of cooperative effort, schemes of this kind are very hard to bring to fruition. Well done, the town of Jette.

We thank Martine Wauters for allowing us to translate and reblog the post on her blog. In her own words:

The school before work started
This is the realisation of a wonderful project: nest accommodation integrated into a school building

I am pleased to announce that a project that I have been dreaming about for the last 5 years has finally materialised: the installation of eight nestboxes for Swifts integrated aesthetically into the facade of a local school (French section and Dutch section) of my town in Jette (Brussels NW), as part of a renovation project.

And it is the kind of project that I like: the result of a successful collaboration with several groups and individuals: from the municipality, including two aldermen from different political parties and two officials from different departments); one building contractor and his team; and several national and international experts. My thanks to them all!

Components: a face-plate, a pipe and a nest box
In alphabetical order, the contributors to this project are:
Louis Philippe Arnhem (Leuven), Swift expert
Laurence Bottini (Municipality of Jette), Municipal Heritage Department, and responsible for the building site.
Christel Matthijs, Director Gemeentelijke Basisschool Vande Borne (Dutch section of the school complex)
Edward Mayer (Swift Conservation, UK), Swift expert (www.swift-­
Coralie Meeus (Municipality of Jette), Ecoconsultant
A view from the outside
Dick Newell (Action for Swifts, UK), Swift expert (
Johnny Van Belle (Euronet company), Entrepreneur, and his team (www.euronet­
Sylvie Vanderhaegen, Director of the Jacques Brel School (French section)
Claire Vandevivere (Municipality of Jette), Environment
Bernard Van Nuffel (Municipality of Jette), Municipal Property Assets

They are pioneers in the Brussels region, and indeed in the whole of Francophone Belgium Let us hope their example will be followed by many other entrepreneurs, councillors, officials and individuals.

Abroad, experience has shown that this type of development is appreciated by Swifts, who prefer nest boxes affixed under ledges. Fingers crossed that Swifts will soon discover the five­-star hotel we have created for them.

A view from the inside

Inside view of 4 nest boxes

Outside view of 8 entrances

Thursday, 27 August 2015

A new swift tower in Amersfoort, The Netherlands

Swift towers are going up everywhere from Northern Ireland to Poland, and from England to Germany. The design, materials and methods for erection and maintenance are varied. Do they work? Occupancy rates continue to be modest, so all reports of Swifts using them for breeding are welcome. One thing for sure: they make a bold public statement. So, even if we don't get a return on our effort equivalent to the success of, say, nestboxes in buildings, they have the effect of raising public awareness of the importance of Swift conservation. The latest example of a Swift tower comes to us from the Netherlands. The design is ingenious, with a foldable mast/pole, allowing easy erection and dismantling for maintenance. We wish our Dutch colleagues luck with their venture

Contributed by Marjo van der Lelie

This new Swift tower in Amersfoort, the Netherlands, was designed and built by the Gierzwaluwwerkgroep Amersfoort (Swift Volunteer Group). It is made of red cedar. This type of wood was chosen for its durable and light qualities. The total weight of the tower is 33 kilograms.

On top of the 8 metre pole
The mast is similar to the one used in the Den helder tower. It is a standard product that is generally used for the lighting of sports fields. It is foldable and weighted so it can support the weight of the tower. The mast is 8 meters high. A platform made of galvanised steelplate is welded on top of the mast. The tower is fixed onto this platform with bolts.
Because the mast is foldable the tower is within easy reach for future work: the mast can be lowered using a winch.

Internal structure
The tower contains a small speaker. Electricity is supplied by a solar panel at the back of the speaker. Twice daily the sound of the swifts is played to entice the swifts. The roof of the structure is doubly insulated to prevent high temperatures in the nest boxes. The centre of the structure also contains a ventilation shaft for cooling the nests.

Ready for erection
The Swift Volunteer Group has christened the tower the ‘Hotel Apus’. This hotel has 15 spacious rooms. Every entrance is decorated with a wooden character. Together they make the word ‘GIERZWALUWHOTEL’, Dutch for ‘Swift Hotel’.

The tower was erected on Friday 26 June 2015. Marjo and Fred van der Lelie and Gijs Valkenhoef were the creative and organisational masterminds behind this swift tower. We hope the swifts will soon take up residence!

More information can be obtained from Marjo and Fred van der Lelie at

And here is the movie!

Tuesday, 25 August 2015

Birdfair 2015

We need not have doubted our decision to take a stand at Birdfair, billed as 'The international wildlife event of the year' 2015.  It was busy, exhausting, exhilarating and we got to talk to hundreds of people.

Our presence was a joint effort by Swift Conservation, Swifts Local Network and Action for Swifts. Our display panels showed everything from the problems Swifts face to the solutions.

Visitors were stunned by our display comparing tracks from Cambridge and the Beijing Swift Project, which we believe is the longest recorded migration of any bird other than a seabird or a shorebird.

We had nest boxes on show, as well as 2 Cheng Shengs playing calls, which seemed to be universally liked by all our visitors. We were not difficult to find! On the corner of our stand, we had an Apple computer playing rolling videos of Swifts in nest boxes and nest box ideas.

John Stimpson kindly provided flat-pack Zeist nest boxes for us to sell. We sold all 34 flat-packs, a few of which were a new design. We also sold a good number of Cheng Sheng attraction kits. Together with generous donations, this all helped to cover the cost of the stand.

A number of people said we had the best stand in the show (there were 380 stands) and Edward spoke to a standing-room-only audience. Edward was told that his was the best talk in the whole show!

It would have been even more exhausting, but for our team of volunteers, so thank you to Vida, Jake, Judith, Chris, Peta, Bill, Bob, Maurice, Tanya, Edmund, John, Tim, Glynne, Rowena and Nick (did I miss anyone?). And thank you to everyone who dropped by to see us.

The pictures below tell their own story:
A gleeful Edward mayer. Photo Judith Wakelam
Edward Mayer left and Dick Newell right. Photo Judith Wakelam

Hu Qiongmei (China Birdwatching Society) and Zhu Lei (English name "Robbi")
from Parrotbill Bird Tours, Sichuan, visit the stand
Gray Jolliffe's cartoon and Tom Lindroo's Swift were visible from a long way off

Bill Murrels left and an animated Edward Mayer

Nick Baker and Dick Newell. Photo Rowena Baxter
Our display comparing the migration of Cambridge and Beijing Swifts. Photo Judith Wakelam
Enlarged version of our map - Click to enlarge

Tuesday, 11 August 2015

Swift boxes in the sun - by Clarke Brunt

The normal advice for Swift nest boxes is to avoid south-facing walls. The real issue is to not subject breeding Swifts to high temperatures. South-facing walls are fine with the right kind of nest boxes.

by Dick

When Clarke Brunt moved into his house in Milton Cambs in 2006, he found some strange looking nest boxes on the south wall of his house. He eventually discovered that these were Swift boxes modelled on boxes installed on The Hirsel in Coldstream, Scotland by Major Douglas Hume, the naturalist, in 1950-54, with a modification designed to exclude House Sparrows. Clarke converted them back into something looking more conventional as well as adding a number of other boxes of various designs.

5 of Clarkes boxes. The first box occupied is the one on the left,
before it was painted white. He also has Swifts nesting inside
entrances in the eaves. Photo Clarke Brunt
This year, 2015, Clarke had 6 pairs of Swifts breeding successfully, 2 of which were in holes in his eaves, but 4 of which were in nest boxes exposed to the mid-day sun.

The main characteristic of these boxes is that they are painted white and some are made of wood 15mm thick. The Zeist boxes are made of 12mm plywood. This is sufficient to keep the temperature within acceptable limits on this east of south-facing aspect.

Clarke's house, just left of centre.
The Swift boxes are on the east of south-facing wall
I first became acquainted with Clarke as I used to cycle past his house on the way to Cambridge, and I heard Swift calls being played. It took some time before we eventually connected, and since then I have been intrigued by the progress of his colony.

Clarke's garden is a haven for wildlife with regular hedgehogs, newts in the pond, tame Starlings perching on Clarke's hands for food and a wonderful display of plants and beehives and, of course, a great Swift spectacle through the summer.

Clarke's Swifts have been online for the last 3 years, with 3 chicks being raised in both of his camera boxes this year.

So, as we have said before, south-facing walls are fine, provided the walls of the box are thick enough and they are painted white.

You can read more about Clarke's Swifts on his website.

Thursday, 6 August 2015

Swifts get established in Dry Drayton

This is the story of a Cambridgeshire Village, originally with no known breeding Swifts, but now with a street with a growing Swift population.

by Rowena Baxter  Photos: Clive Cooper

During June 2008 I noticed several swifts investigating the eaves of the houses in Pettitts Close, Dry Drayton.  These houses were built in 1975, all to a fairly similar design, some with the eaves apex at the front and some with the apex at the side.  All eaves have an overhang of about 9 inches. Knowing that the houses were unlikely to have holes in their roofs or soffits suitable for breeding swifts, I contacted Dick Newell.  He suggested I put up a swift box, or even better, two.  So I bought two Zeist boxes from John Stimpson and Clive fixed them to the east wall of our house, under the eaves and around 7 feet above the garage flat roof.  

I also persuaded a neighbour further down the road to have a Zeist box.  He fixed it to a west-facing wall where the flyway was partly blocked by the house next door [See Fig. 6].

Dick advised that to make it easier to attract swifts to our boxes, I should play swift calls while the swifts are here from mid-May to end of July.  So in 2009 I bought a CD of swift calls from Swift Conservation and initially played calls on a CD player from the bedroom window on the south side just around the corner from the swift boxes.  This didn’t seem very satisfactory as it was not near the boxes, so I set up a very basic CD system in the garage playing swift calls, with speakers in a plastic box on a table on the flat roof beneath the boxes.  This involved my climbing in and out of the bedroom window whenever rain was due to shut up the plastic box to avoid the speakers getting wet.  The CD player was not suitable to be used with a timer.  If we were out for any length of time, away or during bad weather no calls were playing

Fig 1. Two Zeist boxes on south wall, painted white

However, the calls and the boxes attracted swifts that summer and they investigated the boxes, looked inside even, but here I made a major mistake.  Alongside the roof are some trees which blocked the route into the boxes from the east and I felt that this was a disadvantage as the route in from the south was free of any trees and completely open. So after some thought we moved the boxes to beneath the eaves on the south side and painted them white to reflect some of the heat from the sun.

Two more Zeist boxes made by John Stimpson were attached to the house next door, towards the back of the east side, over a flat garage roof, with a clear flyway over the back gardens [See Fig 5].

Fig 2. white Zeist boxes and new cabinet box
For two years I played the calls during May, June and July, in good weather, covering the speakers when it rained.  The swifts, attracted by the call playing, showed no interest in the same Zeist boxes on the south face.  

Following the second unsuccessful season in 2010 I consulted Dick again and he suggested that a cabinet box, end on to the south with four compartments, might be more successful.  The new box, made by Bob Tonks, was attached to the east side, entrances facing south, in April 2011.  The call playing system remained the same, speakers on a table under the box.

During the 2011 season there were plenty of swifts attracted to the calls but none seemed to discover the entrance holes in the new box and none found the other Zeist boxes (where there were no calls playing).

2012 started well.  At least 2 swifts were seen entering the cabinet box mid-May with at least 2 birds going to roost on 21-29 May during a spell of very good weather.  Second mistake made here:  I decided to stop playing the calls since the nest site had been found.  No calls were played for a week or so, and the weather turned cool and wet.   On Dick’s advice we started playing again in early June.  The rest of the summer in 2012 was frequently cool and wet, the speakers were rained on more than once and no further progress was made.

In 2013 swifts arrived rather late probably due to poor weather conditions in early May.  I switched the call playing system to a Cheng Sheng player with SD card, on a timer, with car ‘tweeters’ attached to the base of the cabinet box, which is much more convenient and reliable.  During this season, 2 pairs became established in the cabinet box, but no breeding took place.  

Fig 3. New boxes designed for local sloping eaves
All of the eaves had the same 22.5° slope.

In 2014 2 chicks were successfully fledged from each of the 2 occupied spaces in the cabinet box at the end of July, and late in the season it was realised that 2 chicks were also being reared in the single Zeist box down the road.  

It turned out that the swifts were having no trouble in accessing that box and 2 young fledged as late as 23 August. In the light of this success, and given the tolerance, support and enthusiasm of the local residents, Dick designed a box suitable for sloping eaves and John Stimpson made them.

Fig 4. New boxes being installed
2 each of these boxes were installed on 5 houses in April 2015 and 4 more Zeist boxes were added close to the single one which had successful breeding [see Fig 6] 

One resident made his own Zeist-type box. A smaller cabinet box with two entrances (again made by Bob Tonks) was attached to the house next door in a similar position to our larger, successful one. This wall also houses the 2 Zeist boxes installed in 2012 and both of these have also attracted swifts in 2015 albeit without nesting [See Fig 5].

Fig 5. Cabinet box with 2 entrances 
(note 2 Zeist boxes at rear)
In 2015 2 chicks fledged from the original Zeist box used last year, a 2nd Zeist box on the same house [Fig. 6] was occupied and also produced 2 young; and as last year, 2 compartments in our 4 compartment cabinet box produced 2 chicks each. 

In all, 8 chicks were successfully fledged in Pettitts Close this year.

The moral of this long story is that persistence does pay off eventually.  Keep playing the calls!  Swifts have been made very welcome in Pettitts Close (there are now 23 nesting opportunities on 8 houses) providing us with tremendous entertainment during the 3 months that swifts are our guests.

Fig 6. House with 1 box originally and
4 added in 2015 (note cramped access)
Fig 7: Our first 2 chicks in 2014

Friday, 24 July 2015

Trumpington Swift Tower 2015 update

The tower is appreciated by the local
Wood Pigeons (click to enlarge)
The Trumpington Community Orchard Swift Tower was erected in October 2013 (see story), and its first full season was 2014. Although attraction calls were played throughout the season, as far as we know, no Swifts occupied any of the nest boxes. Now in 2015 we have our first breeding pair.

by Dick

This is great news and a well deserved reward for all of the effort put in by everyone involved. Screaming parties of up to 20 birds have been seen circling the tower.

A Swift was first seen entering the tower by a member of the public in late May, but it was not until 28th June, when 2 birds were seen entering the same nest box at dusk, that a pair was confirmed. Since then chicks have been heard cheeping when parents enter the nestbox, this is proof of breeding. Also occasional entries to other nest boxes have been witnessed.

This post also gives us an excuse to publish a picture of the tower (above), complete with its 20W solar panel, 2 bat boxes and squirrel barrier. The triangular cabinet, half way up, supports the solar panel and contains a 25 amp-hour golf cart battery, regulator, timer and Cheng Sheng player amplifier.

A parent leaving the box on the left

Sunday, 28 June 2015

Another gable in the sun

My daughter and son-in-law decided they would like a Swift box on their Elsworth, Cambs house. The only viable place was at the top of a west-southwest facing gable end.

[Postscript: On July 1st 2015, the "hottest July day ever", the temperature reached 32.8°C in the box - well within safe limits]
[Postscript 2: on July 23rd, A Swift enters the top box. There have been up to 7 'bangers' pulled in by the attraction calls]

by Dick

The design is a very similar idea to this box, which did not have a potential over-heating problem. This configuration contains just 3 nest chambers. West-southwest is not as bad as south, but the afternoon sun could well be a problem.

4 things should keep the temperature within reasonable limits:

•  The front is 24mm thick - 2 layers of 12mm plywood.
•  The shaped battens cover about half of the front and provide shade from sun directly into the entrances.
•  It is painted white.
•  Air can ventilate into the space between the box sides and the eaves.
A wireless max-min thermometer has been placed in the top box to monitor the maximum temperature each day.

The battens keep the entrances in the shade. The tweeter is attached to the bottom of the box with Velcro.
[Postscript: the swifts pulled the tweeter off, so it has been moved inside one of the boxes]

The detailed construction is illustrated in the pictures below:

Tuesday, 23 June 2015

Maiden Tower, Baku, Azerbaijan update

We previously reported on the Swifts in the Maiden Tower here
It was one of the most stimulating talks at the Cambridge International Swift Conference

Maiden Tower on the left, nest boxes o the right

Despite extensive restoration of the Maiden Tower, the project team were able to keep up to 150 nest cavities in the Tower itself. In addition, many more nest cavities were created on a neighbouring modern building. By regular watching during the breeding season and inspection of sites afterwards, it was estimated that at least 40 pairs bred. Playing of calls seems to be very successful and the team are expecting the number of breeding pairs to grow in coming seasons. A valuable spin-off from the project is the publicity given to Swift conservation: last year over 250 official delegations visited the Tower and the adjacent building.
For this update, we wish to thank Samir Nuriyev, Director of the Administration of State Historical-Architectural Reserve “Ichersheher” under the Cabinet of Ministers of the Republic of Azerbaijan.
Special thanks are also due to Mrs Leyla Aliyeva, Vice-president of the Heydar Aliyev Foundation and founder of IDEA (International Action for Environmental Action) for initiating and coordinating the project to provide alternative accommodation for Swifts in the adjacent modern building.

 One of the challenges to architects and designers is how to add Swift accommodation to a new building in a way that does not spoil the appearance of the buildilng. Essentially you either try to hide the boxes, or you make a feature of them. The Baku architects took the second route and boldly arranged the boxes on the buildling surface to look like giant Swifts.

Sunday, 24 May 2015

Beijing Swift project preliminary results

Action for Swifts is delighted to have been involved in the Beijing Swift project where we attached 31 geolocators to Swifts at the Summer Palace in 2014 (see story). On 24th May 2015 we retrapped 13 of these birds, and downloaded all of the data successfully.

by Dick

Prior to this project, the journey made by these iconic birds - synonymous with Beijing since 1417 when they made their nests in the original city gatehouses, was a matter of speculation. We now know that they arrive in Beijing in April and, after breeding, begin their long journey to Africa in late July, taking a route that first leads them west-northwest into Mongolia, from where they pass north of the Tianshan mountains, then south through Iran and central Arabia into tropical Africa, before spending 3 months of the winter in Namibia and the Western Cape.

They begin the return journey in February, retracing a similar route on the way back, arriving in Beijing in mid-April, a journey that sees them cross about 20 borders. 

For the full story, read the Press release

One track of 13 geolocators recovered (click map to enlarge)

Lyndon Kearsley releasing a Swift with geolocator PhotZhang Weimin

Terry Townshend, right, releasing a Swift PhotZhang Weimin

Sunday, 10 May 2015

Milton Country Park, Cambridge

Milton Country Park is an attractive local amenity, with trees, open spaces, lakes and a visitor centre. The visitor centre provides a suitable opportunity for some Swift boxes on one of its gable ends.

The park has a small staff of wardens and rangers and also a band of volunteers to help with maintenance and upkeep. The idea for Swift boxes came from Clarke Brunt, one of the volunteers who lives in Milton. Clarke has a successful colony of Swifts on his house which you can see online.

2 sets of 3 boxes, each with a double roof
The visitor centre has no eaves, and the gable end is quite exposed. So we made our own eaves by putting a double roof across 2 groups of 3 boxes, designed to fit the angle of the roof (18°). The roofs are covered with roofing felt.

The entrances are at the left (high) end of each box, as fitting cameras, eventually, will be made easier.

The result fits in with the architecture of the visitor centre.

A tweeter was attached to the side of the 2nd box from the left, driven by a Cheng Sheng player-amplifier.

Following future success with this project, there is scope for at least another 9 boxes on this gable end.

The double roof is effective in the mid-day sun
See Milton Country Park website