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Nuthatches prefer to occupy larger boxes like the Schwegler range of owl boxes, because of their larger internal diameter, rather than alternatively available smaller nest boxes. They fill the large entrance hole with clay and damp soil until it matches their required diameter of 32 mm, thus preventing larger birds from gaining access. To overcome this, the Schwegler 5KL Nuthatch nest box has been designed specifically for this uniquely agile species.
No sawdust or other similar material need to be placed inside because the Nuthatch, in common with all other small birds, will construct its own nest.
To keep Nuthatches out of Owl boxes, it is advisable to hang a 5KL nest box directly adjacent to the Owl box, even on the same tree.
Material: Schwegler wood-concrete
Interior diameter of nesting chamber: 200 mm
Diameter of entrance hole: 32 mm
Weight: approx. 8.4 kg
External dimensions: diameter 250 x height 300 mm
Schwegler nests will last at least 20-25 years and are readily adopted by birds. This means several decades of breeding success in real life conditions. These nest boxes have been developed in close collaboration with leading ornithologists, nature conservation organisations, Government conservation agencies and forestry experts, and are backed up by decades of experience and knowledge. They are made of a unique wood-concrete material, an entirely natural product consisting of 75% wood and various additives to compensate for climatic changes. This provides insulation against temperature fluctuations, allows air to pass through the walls, and prevents the formation of condensation which often occurs in nest boxes made of plastic, stone or entirely of concrete. This material is also much longer lasting and weather-resistant than wood, and is strong enough to withstand the attention of woodpeckers.
In each nest box the size of the brood chamber, diameter of the entrance hole and many other features have been adapted to the needs and behaviour of the animals themselves. Experiments by bird protection organisations worldwide have demonstrated that the highest density of bird populations (i.e., breeding pairs per hectare) is achieved with Schwegler nest boxes.
Schwegler nest boxes have been officially recognized and approved by the following organisations and numerous others worldwide:
German Federal Biological Centre for Agriculture and Forestry (BBA)
German Nature Protection Association (NABU)
Bavarian Regional Association for the Protection of Birds (LBV)
German Environmental Protection Association (DUH)
Jordsand, Society for the Protection of Seabirds and Nature
EURONATUR/European Cultural Heritage Foundation
Luxemburg Association for the Protection of Birds and Nature
Blue Bird Association of North America
Global Nature Fund