Trees can support species which are protected in law, in particular nesting birds, bats and red squirrels (dreys)
Either undertake tree felling and pruning work outside the bird nesting season - not during the period 1 March to 31 August - or within these times only if it can be clearly established that nesting is not underway
For mature trees, consider pollarding ash trees at 2m height. This may be an alternative to felling. This way some of the tree’s wildlife value (holes for birds and bats and lichens on trunk) can be kept while minimising the risk of the tree’s failure.
If trees have features such as cracks, cavities/hollows, dense ivy growth, bats are more likely to be present. If suspected employ an ecologist or seek advice from Natural Resources Wales (NRW) as a licence will be required before felling or pruning works can proceed. See Legal Considerations.
A consent licence would also be required from NRW if a red squirrel drey is present.
If trees are growing in a protected site such as Site of Special Scientific Interest (SSSI) you will also need to obtain consent from Natural Resources Wales (NRW).
Plant new trees for the future. If trees need to be felled for safety reasons, reduce the ecological and landscape loss by planting replacement native species using the 3-2-1 formula: plant 3 saplings for the loss of a large tree, 2 for a medium tree and 1 for a small tree.
This list does not cover all potential wildlife issues.