Reed Warbler
18 Jun 2010
Earlier this week a colleague asked if BirdTrack had any evidence for a 'second wave' of Reed Warbler arrivals. At first glance the Reed Warbler reporting rate didn't grab me but when compared to the reporting rate for Sedge and Willow Warblers, it was immediately apparent that the Reed Warbler reporting rate remains fairly constant through into July, whilst tailing off much earlier for the other two species. We know Reed Warblers have multiple broods but perhaps their continued 'detectability' is caused by a second wave of arrivals moving in to previously unoccupied territories? Please birdtrack [at] bto.org (email us) if you've noticed anything that might support or refute this idea.
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