BIJLSMA RG & MANEN W VAN (1989) Current research: Prey Persecution in Northern Netherlands. LIMOSA 62 (2): 95-96.

Legal protection of raptors, the Netherlands a fact since 1936, does not guarantee for a undisturbed existence of raptors. The massive death of raptors in 1966-69 due to the use of seed disinfectants in agriculture is their an example. Only prolonged lobbying by the ministries, including the Committee for Conservation fauna of Drenthe, eventually led to a prohibition on the use of mercury, aldrin and dieldrin, and in 1973 of DDT. Ret raptor recovery of the Dutch population Since the early seventies is well known, which also ignores the Demographic developments at Spotted Harrier, Hen Harrier and Kestrel. The re-occupation of the Dutch population

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