Every summer in early May, bird-minded Brits start looking for the swifts. The birds come screaming up from Africa and southern Europe like arrows, filling the sky with a fantasy of speed. They’re here for just a few months to return to their mates and their nests and breed, the only time of year their little stubby feet will touch down. Their nests are high up—once on cliffs, now more likely in the eaves of buildings—so they can drop easily down into the air on their foraging trips for drifting nest-makings and insects and spiderlings.
For someone from the western U.S., Europe’s common swifts (Apus apus) are a treat. Before, I had only seen one other species of swift, the white-throated, a few times, slicing high around a remote cliff face—nothing like the daily sightings of acrobatic squadrons in the sky above my house in Cambridge. Learning about their yearly sojourns and heroic feats of continuous flying endeared them to me even more. And the David Attenborough Building swift nest boxes clinched the deal.
