Bird Free will always be effective when applied to the habitat (nesting site, night roost, etc) of the bird. Applying it around the periphery of a nesting site which has not been treated will not deter birds from returning to untreated nests. Where nesting sites are inaccessible (under plant, solar panels, etc), the gaps through which the birds enter will need to be closed with a metal grille, etc. To deter birds from nesting on balconies, remove the nest, disinfect and apply Bird Free to the nesting site itself.
Bird Free is supplied in boxes of 15 pre-dosed PET dishes. With lids removed dishes are 65mm diameter, 8mm high. HSE authorization no: UK-2018-1127-0001.