Wednesday, 15 March 2017

Swift boxes in southern Sweden

Benny Båth
We received this story and pictures from Benny Båth who lives near Rydsnäs in central southern Sweden. Benny has built many nest boxes for a range of species, but has only installed Swift boxes before last summer. He has some success already and useful experiences to share

Benny writes: 

"I have about 35 nests at 6 sites for swifts but I'm a bit unsure about the best way to place them. Some of my boxes are placed close to each other but it seems that the birds choose boxes with some distance between them.

I had seven boxes located on three different walls at my home and got one box occupied on each wall, it was then that I started to suspect they might prefer some privacy.

No occupants at the other sites were recorded, but I will open all the boxes soon.

I've noticed that the sound system is essential for fast results, I had swifts prospecting on all sites with sound systems (4) including the three nesting pairs with two chicks each at my own home. 

At the moment I  am building four internal boxes on my barn gable, facing west, the main reason is to get the nests out of the heat. I measured the temperature in the box next to the occupied box this summer. The maximum temperature reached 42°C!

I construct entrances by drilling a 64mm hole in the box and the barn wall and then fit one of the front plates outside. This plate is 9mm plywood with an oval hole of 60x30mm. I painted the plate soft yellow and around the hole with black so its seems more distinct from a distance. I got the idea to paint black near the hole from a post on Bristol Swifts website.

All three nesting pairs at my home chose boxes with this kind of front plate so it will be interesting to see if it was a coincidence or if it actually has some effect.

The farmers nearby are really cooperative and I have permission to install both internal and external boxes at many sites, this year I will have about 80 boxes and 8 sound systems up."

Benny has modelled his external boxes on the Model 30, but with a roof sloping at 15°. The material is plywood clad in 1.5mm GRP (Glass Reinforced Plastic) - so they should last for a long time.

It seems that, from a standing start, Benny has considerable momentum!

DIY nest box with removable entrance plate

Nest box with concave made of Asfaboard, a bituminous fibrous material

2 boxes installed on Benny's house

Entrances to internal boxes installed in the barn

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