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Bert (A.H.) Roos: Sperwer (man) / Sparrowhawk (male)
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Bert (A.H.) Roos: Sperwer neemt een duik / 'diving' sparrowhawk
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Bert (A.H.) Roos: Sperwer (man) / Sparrowhawk (male)
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Bert (A.H.) Roos: Sperwer droogt op in de zon / Sparrowhawk drying in the sun
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Bert (A.H.) Roos: Vink / Common chaffinch
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Bert (A.H.) Roos: Kuifmees / Crested tit
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Bert (A.H.) Roos: Grote bonte specht / Great spotted woodpecker