Waarnemingen van Boomvalken Falco subbuteo...meestal ‘ships that pass in the night’
De Takkeling , Volume 5 - Issue 2 p. 22- 24
Compilation of non-systematically collected observations of Hobbies in The Netherlands in 1994-96 shows that Hobbies are most often observed in July through September (Table 1). It remains a mystery whether such birds imply local breeding birds, stragglers or migrants.
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