Guano and white splash on your roof near the chimney are other things to look for.
Jackdaws nesting in roof.
Usually modern homes don t have enough chimney space but here is some advice if you do find birds in your chimney.
They start with big sticks and keep piling them up until they hold firm then they add more material until it is at a level where it provides a safe base for the nest part of the construction.
A general licence issued by the government allows authorised persons to kill or take roof nesting feral pigeons in britain and house sparrows starlings and feral pigeons in northern ireland and destroy their nests but only if it can be shown that action was necessary for the purpose of preserving public health.
Birds are rarely the cause of the damage that let them into a roof and they rarely cause any further damage to a roof during the nesting period officially from february until august and so we see no harm in giving birds sanctuary and.
Just to give you a bit of my own personal background i m a nest recorder bird ringer who is actively involved with over 300 nesting birds.
But feral pigeons swifts swallows jackdaws and barn owls are also known to nest in roofs.
Many of the birds that use roof spaces are now species of conservation concern.
What can i do.
Prevent birds from nesting in your roof.
Jackdaws often drop sticks into nesting cavities into places like chimneys tree hollows or gaps in roof fittings.
Jackdaws and swallows may nest in old cottages with very wide chimneys.
Bats in the house bats are frequent visitors in both old and new houses.