Common reed bunting / Rohrammer (Emberiza schoeniclus)

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Wikipedia Common reed bunting (emberiza schoeniclus) m. By Charles J. Sharp - Own work, from Sharp Photography, sharpphotography, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=31607772
Classification: Genus Buntings (Emberiza); Tribe Emberizini; Subfamily Emberizinae; Family Fringillidae
Appearance and identification:

A bit like General Burnsides: white sideburns, here curling back around a black head. [Link]
Song:

Song variable between individuals and breeding status: A short sequence of 3-5 brittle and buzzing sounds, repeated consistently with marked pauses. Last sound in phrase often has a conclusive feel, but not always. Paired males sing slower than unpaired. Unpaired male song also more contracted, making the pauses between each phrase stand out. [Link]
Calls:

Contact call a sharp, descending and drawn "tseeeoo". A bit similar to Yellow Wagtail, but not as sharp and explosive. In migration a thick, and unmusical "chong" is often heard. [Link]
Physical details: length=15-16 cm, wingspan=21-28 cm, weight=16-25 g
Habitats: Wetland

Song: General: At Fanel I heard sequences of whistles and trills (buzzes?), just a few notes, but wandering up and down: m h lll, or l m hhh m. Listen to recording of 2022-06-25 13.37.28
Song:

BirdID: A short sequence of 3-5 brittle and buzzing sounds, repeated consistently with marked pauses. Last sound in phrase often has a conclusive feel, but not always. [Link]
Song attributes: Melody: stereotype melodic, slow, Frequency: 3-7 KHz Special sounds: trill
♫ (song)