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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Upcher`s Warbler or Olive-tree Warbler (1 Viewer)

First clues are the choice of perching place (on top of a bush and not on leafy branch), leggy appearance, brownish colour and not so strong bill.
Finer details : rather rounded tail, primary projection about 2/3 of tertials length, long middle tertial with its tip reaching close the longest tertial tip, P3 emargination falling short of secondaries tips.
 
look at the key features (basing on bird guides) : clear white patch on secondaries (pro olive) - not; clear briaght edges of great coverts (pro olive) - rather not; evident, wide supercillium (pro Upcher's) - yes; quite short primaries projection (pro Upchers) - strongly yes; blackish tail, wing (pro olive) - rather not. So - Upcher's for me.
 
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