Not wood pigeons or doves. They are pigeons that are derived from the domestic pigeons that have returned to the wild. Same things that roost in towns and cities.
// The domestic pigeon was originally bred from the wild rock dove, which naturally inhabits sea-cliffs and mountains. Rock, domestic, and feral pigeons are all the same species and will readily interbreed. Feral pigeons find the ledges of buildings to be a substitute for sea cliffs, have become adapted to urban life, and are abundant in towns and cities throughout much of the world. Due to their abilities to create large amounts of excrement and to carry disease, combined with crop and property damage, pigeons are largely considered a nuisance and an invasive species, with steps being taken in many municipalities to lower their numbers or completely eradicate them.//