EGGENHUIZEN T (1997) Actualities: Call. LIMOSA 70 (2): 87-87.

As part of our research on the population of the Buzzard in Flevopolders and Friesland since The kart racing springs (using pens, secondaries and tail feathers labeled. The stamp represents the ring number. In this way, zander caught the bird once nes is much additional information is gathered be. The molting partly overlaps with the breeding season, ruiveren to a nest thus indicate that at least one of parents is ringed with ring number which is happened. If the boy can then be ringed The relationship established between parent and ringed ringed boy.

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