This bird has flown.

Alas, the landlord of the swift house next door doesn't want a herd of foreign women touring the place and possibly stealing his proprietary swift-luring technologies.

I have been more aware of the swift houses around me though. The other day I was at TESCO at sunset, and watched dozens of swifts flittering about, silhouetted against the brilliant orange sky as they darted after insects and swooped in and out of a swift house entrance, far and high on the only inhabited building on the block.