Foraging behaviour and identification of Upcher's Warbler
01 June 1990
Main paper
As noted by Shirihai (1987), Upcher's Warbler Hippolais languida is one of the least-known West Palearctic warblers. It is a fairly common spring passage migrant in Oman, and in 1988 it occurred commonly from late April to mid May in a 1-kmĀ²...
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