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Bert (A.H.) Roos: Pimpelmees - Blue tit
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Bert (A.H.) Roos: Koolmees - Great tit
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Bert (A.H.) Roos: Glanskop - Marsh tit
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Bert (A.H.) Roos: Boomklever - Nuthatch
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Bert (A.H.) Roos: Boomklever - Nuthatch
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Bert (A.H.) Roos: Vink - Finch
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Bert (A.H.) Roos: Grote bonte specht - Great spotted woodpecker
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Bert (A.H.) Roos: Roodborst - European robin