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Building a bird box

Nest boxes in gardens are often occupied by blue tits or great tits

Try to get your nest boxes in position as early as possible, preferably at the beginning of January. Our blue tits started making exploratory visits in mid February. Each year on St. Valentine's Day - 14th February - the British Trust for Ornithology (BTO) launches its National Nest Box Week, with the aim of encouraging people to put up nest boxes to help breeding birds and other wildlife.

The plan layout for a typical nest box is shown below. Many decorative bird boxes are totally unsuitable for parent birds and their families. Bird boxes designed as an integral part of a bird table are unlikely to be occupied. It would be like living above a fast food take-away! Choose a quiet and undisturbed part of your garden for the completed box.

To print this plan in Windows XP (when using Internet Explorer as your browser), simply hover your mouse over the drawing below and click on the printer icon that 'floats' over the plan. For previous versions of Windows, right click on the image and choose 'Print Picture...'

Bird box cutting plan

The bird box dimensions shown here are very similar to those recommended by the RSPB. These nest boxes are suitable for small birds such as blue tit / great tit.

My bird boxes were made using 12mm exterior ply wood. The roof dimensions allow for an overhang at the sides and front to let water drain away and to keep the interior dry.

Make sure that the entrance hole is at least 12.5 cm from the floor of the box to keep the young chicks safe from predators. A hole diameter of 25 mm will allow blue tits, coal tits and marsh tits to enter the box. Use 28 mm for great tits and 32 mm for house sparrows, tree sparrows and nuthatches.

I used brass screws to fasten everything together and also screwed on the roof to allow access to the nest box camera and to enable the nest to be removed at the end of the season, in either October or November.

Water based preservatives may be used on the outside of the box only. Keep any preservative away from the entrance hole, as birds often tap this regularly with their beak before deciding whether to occupy.

Drill a couple of small holes in the base to keep the nest dry.

Hang the box at least two metres off the ground, preferably between north and east to avoid strong sunlight. If fixing the nestbox to a tree it's preferable to use thick wire on the hangers rather than fixing with nails. If you find the birds pecking at the entrance hole, it does not mean that the hole is too small. Click here for an explanation. Do not inspect the nest box when in use, as the parents may desert the eggs or chicks. The completed nest box, minus roof but with its hanging supports, can be seen here. Young bird chicks need live food. Mealworms can be a true life saver if the spring is cold and wet.

| The completed nest box, almost ready for hanging and occupation |
| Sparrow terrace - cutting plans for a bird box for up to 3 pairs of house sparrows |
| Attract wildlife by feeding the birds, constructing a pond and appropriate planting |


If this bird box is not up market enough for your feathered friends,
how about one of these from Durham City Arts?

Click on the pictures for an enlarged view

Durham bird boxes -'A City in the Sky'
Durham bird boxes -'A City in the Sky'

Photographs by John Kelly - used with permission

Read about - 'The Best Bird Boxes in Britain: A City in the Sky'

 

For an exact match - enclose your search in inverted commas e.g. "nest box"

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