Olivaceous Warbler are quite
widespread on the parts of Crete I have visited and have certainly been
plentiful enough around lake Aghia. For more details about birding in
Crete see here.
Lake Aghia, Crete, Greece, July 2009
This species occurs in a variety of habitats on Crete. This bird was in an olive grove near Georgioupolis, June 2010