Years ago, I was the deck officer in charge of two mothballed cutters in Shoreham docks (we always kept 'spares' on standby if we needed extra assets on the other end of the country to the operational craft, and for replacements if any broke down) it was when they were preparing to demolish the chimney of the old Shoreham power station. Unfortunately for the demolition team the abandoned chimney was teeming with feral pigeons and a pair of peregrines had taken residence.
We were berthed right next to the chimney and I chatted a lot to the explosives lads as they were preparing the charges for the 'dress rehearsal' (caps but no explosives) and the grand plan was to first let off a 'harmless' noisy flashbang so that all the pigeons and more importantly the peregrines would take flight, then follow up a few seconds later with the demolition charges.
The dress rehearsal went beautifully although, just in case, they made me move both cutters to a safer berth (which actually gave us a better view) Byt when it came to the actual demolition, for some reason a 'hangfire' developed in the actual demolition charge. Iff went the flashbang, the peregrines cleared off not to be seen for days, the pigeons however, took off en masse, did a large circuit over Southwich, returned and all settled back on the chimney - just as the demolition charge went off!!
there was blood sh!t and feathers everywhere much to the distress of the crowds that had lined the road overlooking the docks to view the spectacle!!
When the new power station was built, they put a nesting box on the new chimney and as far as I know the Peregrines have been there ever since.