Kwartelkoning Crex crex onder mijn raam: over trefkansen van roepende mannetjes
Drentse vogels , Volume 11 - Issue 1 p. 21- 24
During nightly surveys, the calling frequency of male Corncrakes was quantified from 31 May through 5 July 1998 (Fig. 1). Calling frequency was highest between 23.00 and 4.45 hr (summer time), with a registration efficiency of 64-100% between 01.00 and 04.00 hr. Calling was interrupted during adverse weather with strong winds and rainfall.
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