Nick Upton / People watching Swifts (Apus apus) flying around Holy Trinity church during a swift walk organised by the local swift group, Bradford-on-Avon, Wiltshire, UK, June. Digital composite. Model released.
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Nick Upton / Common swift (Apus apus) flying to its nest in a Swift nest box in the belfry of All Saints Church, Worlington, Suffolk, UK, July.
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Nick Upton / Screaming party of Common swifts (Apus apus) flying around a church bell tower at dusk, where a large colony breeds in nestboxes behind the window louvres, All Saints Church, Worlington, Suffolk, UK,...
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Nick Upton / Screaming party of Common swifts (Apus apus) flying around a church bell tower at dusk, where a large colony breeds in nestboxes behind the window louvres, All Saints Church, Worlington, Suffolk, UK,...
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Nick Upton / Nest box for Common swifts (Apus apus) carried by Roger Becket into Holy Trinity church to be fitted in the bell tower, Bradford-on-Avon, Wiltshire, UK, June. Model released.
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Nick Upton / Common swift (Apus apus) call playback system positioned and turned on successfully by Roger Becket and Peter Grayshon below a nest box they've just fitted into a louvred window in the bell tower of H...
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Nick Upton / Nest box for Common swifts (Apus apus) carried by Roger Becket and Peter Grayshon into Holy Trinity church to be fitted in the bell tower, Bradford-on-Avon, Wiltshire, UK, June.
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Nick Upton / Common swift (Apus apus) nest box carried by Roger Becket into Holy Trinity church to be fitted in the bell tower, Bradford-on-Avon, Wiltshire, UK, June.
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Nick Upton / Common swift (Apus apus) nest box fitted by Roger Becket and Peter Grayshon into a louvred window in the bell tower of Holy Trinity church, Bradford-on-Avon, Wiltshire, UK, June.
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Nick Upton / Common swift (Apus apus) nest box fitted by Roger Becket and Peter Grayshon into a louvred window in the bell tower of Holy Trinity church, Bradford-on-Avon, Wiltshire, UK, June.
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Nick Upton / Common swift (Apus apus) nest box fitted by Roger Becket and Peter Grayshon into a louvred window in the bell tower of Holy Trinity church, Bradford-on-Avon, Wiltshire, UK, June.
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Nick Upton / Common swift (Apus apus) nest box fitted by Roger Becket and Peter Grayshon into a louvred window in the bell tower of Holy Trinity church, Bradford-on-Avon, Wiltshire, UK, June.