Nest boxes are readily occupied by both species. The provision of nest boxes on bridges can help to sustain and in some instances has been shown to have increased breeding populations.Whilst both grey wagtails and dippers use similar nest sites they don’t defend a territory against each other and have been recorded nesting within a few metres. So if both species are present it may be worthwhile putting up two boxes at opposite ends of the same bridge and if you are lucky they may both be occupied. Its best to position the box a few metres above the water level to reduce the risk of it being submerged during floods. The box is designed with an angled back to deflect the flow around the box and reduce the chance of it being damaged or swept away by rivers in spate. When mounting this box close to flood prone rivers it should be positioned with the hole of the box facing downstream.Features:Ideal box for dippers and grey wagtails.Designed to create a space for dippers and wagtails to nest when natural cavities beneath bridges are missing.Constructed from 100% recycled plastic.Well suited for damp spots near rivers and stream as there is nothing to rot or corrode.Angled back to reduce chance of the box being damaged or swept away by a river in spate.Equally suited to being placed on vertical walls or the horizontal underside of bridges.Specifications:Material: 100% Recycled LDPE PlasticConstruction: Panels fitted together using integral tabbing system.Fixing: 6 fixing holes, use screws to mount box.Dimensions and WeightDimensions: Height: 20cm, Width: 20cm, Depth: 35cmWeight: 1.3kg