Swift screaming parties
Common swift (Apus apus). Towns and villages nationwide, United Kingdom.
Best time: 1 Jun – 15 Jul (June to July). Where: Oxford University Museum of Natural History tower, Cambridge old town and colleges (United Kingdom). Time of day: Screaming parties race the rooftops in the last hour before sunset and right through dusk on warm evenings.
- You can go on your own
- Free
- No binoculars needed
- Sound 4/5
Open it in the interactive calendarSunrise and sunset listening times for the day you pick, and the map.
When is the best time?
Peak: 1 Jun – 15 Jul. June to mid July (they leave in early Aug)
Active from 5 May to 10 Aug (May to August) in a typical year.
Time of day
Screaming parties race the rooftops in the last hour before sunset and right through dusk on warm evenings; a shorter, quieter bout in the first hour after sunrise.
- Evening screaming: 1 h before sunset → last light
- Morning parties: sunrise → 1 h after sunrise
What will you hear?
High-speed screaming packs racing around rooftops, doppler passes at head height, and the sound of summer evenings.
Binoculars?
No binoculars needed. Screaming packs at rooftop and head height — naked eye.
Where to go
- Oxford University Museum of Natural History tower — Long-studied colony; college quads nearby are enclosed and relatively quiet. Map
- Cambridge old town and colleges — Enclosed courts give good rooftop acoustics. Map
How to go on your own, and what it costs
Stand in the street: Parks Road outside the Oxford University Museum at dusk, or the lanes and courts of central Cambridge (many college courts are open to walkers by day; the streets are free at any hour). No permits.
Cost: Free.
Field-recording notes
Great doppler material — rooftop or courtyard rigs, stereo or ambisonic, catch the passes from all sides. Urban noise is the constraint; late evening and Sundays are quietest.
Sources
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More: all spectacles in the United Kingdom · dawn choruses · the United Kingdom in June · the United Kingdom in July