Eastern subalpine warbler / Weissbartgrasmücke (Sylvia cantillans)
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General: 
The eastern subalpine warbler (Curruca cantillans) is a small typical warbler which breeds in the southernmost areas of Europe. It was first described by the German naturalist Peter Simon Pallas in 1764 and given the binomial name Motacilla cantillans.[2][3][4] The specific cantillans is Latin for "warbling" from canere, "to sing".[5]
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Song:
Song a rapid, vivid stream of squeaks and clearer notes, with timbre similar to Whitethroat. [Link]
Calls:Alarm call a short, hard "tuk", but softer and fainter than Blackcap and Sardinian W. May be confused with Sardinian W., but lacks that species interwoven hard and rolling contact call. [Link]
Physical details: length=12 cm, wingspan=15-19 cm, weight=8-13 g
🔍 No documented observation
The eastern subalpine warbler (Curruca cantillans) is a small typical warbler which breeds in the southernmost areas of Europe. It was first described by the German naturalist Peter Simon Pallas in 1764 and given the binomial name Motacilla cantillans.[2][3][4] The specific cantillans is Latin for "warbling" from canere, "to sing".[5]
[more]
Song:
Song a rapid, vivid stream of squeaks and clearer notes, with timbre similar to Whitethroat. [Link]
Calls:
Alarm call a short, hard "tuk", but softer and fainter than Blackcap and Sardinian W. May be confused with Sardinian W., but lacks that species interwoven hard and rolling contact call. [Link]
Physical details: length=12 cm, wingspan=15-19 cm, weight=8-13 g
🔍 No documented observation