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Bird nest box maintenance instructions

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Nest Boxes

Nest Box Maintenance

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17th October 2013

Autumn marks the end of the breeding season when all nest boxes should be taken down and cleaned. Annual cleaning is best carried out in October and November when there is no chance of disturbing the previous occupants. By cleaning the box you will remove any ticks and fleas along with their eggs and help reduce the risk of diseases being passed on to the next season’s broods.

1. Remove all used nesting materials* (if there are unhatched eggs or dead in the nest see note below).
2. Clean using boiling water to kill any remaining parasites and their eggs. You may also want to use a specialist disinfectant such as Ark-Klens. Insecticides and flea powders must not be used.
3. Allow sufficient time to dry thoroughly before replacing the lid. Do not use any wood preservatives, fumes get trapped inside the nest chamber and may be toxic to birds.
4. You can place a small handful of dry leaves, wood shavings or hay (not straw) in the box after it’s cleaned and dry because nest boxes may well get used for roosting during cold winter snaps by small birds such as tits or wrens.

Fledgling Nest Box

Additional Notes.
It is not unusual to find a small number of eggs that have failed to hatch, or some young that have died. Blue and great tits may lay over a dozen eggs to allow for such losses. Sudden cold snaps, food shortage, predation or simply inexperience can all lead to complete nest desertion, or limited survival rates.

Cleaning Bird Nest Boxes

Don’t worry if your nest box wasn’t used this year, it may attract an occupant next year. Take it down, check it and clean as required but put your box back up as it may provide a useful roost during the winter months.

Nest boxes in use should not be inspected. Simply watch and enjoy the activity from a distance. If you want to see the chicks as they grow, consider installing a nest box camera.

*Under the terms of the ‘Wildlife and Countryside Act 1981’, if unhatched eggs are found in the box, they can only legally be removed from October to January and they must be destroyed. It is illegal to keep them.