The bird chose to land on the window-sill outside the community education office, where it declined to be enticed into the lifelong learning agenda.
Keen twitchers observed polly looked quite fetching in its green plumage, coincidentally maching the council's own colours. But growing restless, the bird tried a perch on the opposite side of the building, and failed to appreciate the risk: it was the social work window.
Staff craftily devised a mechanism involving a cardboard box and slice of apple to lure the visitor inside where it was duly taken into care and christened Trevor - after the chief executive. If it turns out to be a female Trevor, questions will almost certainly be asked.