Common Swift (Gierzwaluw)
by Rick & José van der Weijde
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Gierzwaluw - Common swift - Apus apus,
by Jos Zonneveld
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Common Swift (Gierzwaluw)
by Wim Deloddere
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Vale Gierzwaluw (Apus pallidus)
by Thomas Luiten
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Gierzwaluw - Common Swift
by Hans Verhoeven
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Common Swift - Gierzwaluw
by Jaap Denee
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Gierzwaluw / Common Swift / Apus apus
by Albert Meek
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Pallid Swift / Vale Gierzwaluw
by Alex Bos
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Pallid Swift - Vale Gierzwaluw
by Jaap Denee
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Gierzwaluw / Common swift
by Art Wittingen
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