Dave Bevan / Slow motion clip of a pair of Common swifts (Apus apus) approaching and entering a nest hole in limestone cliff, Norfolk, England, UK, May.
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Nick Upton / Common swifts (Apus apus) flying overhead, Wiltshire, UK, June. Digital composite image.
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Markus Varesvuo / Swift (Apus apus) in flight. Helsinki, Finland. July
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Ben Lascelles / Great Dusky Swift (Cypseloides senex) Birds flying past rainbow created by waterfalls, Iguazu National Park, Argentina, October 2008
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Markus Varesvuo / Common Swift (Apus apus) in flight, Helsinki Finland July
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Anup Shah / African Harrier-Hawk (Polyboroides typus) adult using its legs to probe into cavity nests for young of birds such as swifts and weavers. Masai Mara National Reserve, Kenya. February.
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Pete Oxford / Great dusky swifts {Cypseloides senex} flying to roost behind waterfall, Noel Kempff, Bolivia, South America
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Kim Taylor / Common swift {Apus apus} nestling. Captive, UK
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Pete Oxford / Great dusky swifts {Cypseloides senex} flock in flight, morning exit from Ahlfeld waterfall, Noel Kempff NP, Bolivia, South America
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Luke Massey / Great dusky swifts (Cypseloides senex) roosting behind one of the falls at Iguassu Falls, Brazil
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Luke Massey / Great dusky swifts (Cypseloides senex) roosting behind one of the falls at Iguassu Falls, Brazil
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Nick Upton / Four Common swifts (Apus apus) silhouetted against the sky as they fly in formation over the chimney of a cottage at dusk, Lacock, Wiltshire, UK, June 2018.
