Bluethroat / Blaukehlchen (Luscinia svecica)

I had an ID via app for an immature or female bluethroat - which has no blue throat, but long legs and a relatively short tail in comparison - could be this. 2024-02-17 07:02:22 Thailand NIKON D5600 ISO 2500
Exposure 1/500
Classification: Genus Luscinia; Family Thrushes (Turdidae)
Looking for it in Kaltbrunnenriet - didn't find it in June 2022.
Sparrow-brown head, then strong blue, orange-brown, blue,dark brown, orange-brown, ending in a white belly!
Song: Song: Structure slightly similar to Nightingale, but tone much thinner and less full-bodied. A good impersonator and various imitations are interwoven among metallic, ringing sounds to form a complex, intriguing song. [Link]
Calls: Call: "pju-check". Double syllable starting as a descending whistle, and ending on a short "check". [Link]
Physical details: length=14 cm, wingspan=20-22 cm, weight=15-25 g
Habitats: Wetland

Song: Often one little phrase or even a single note repeated, a bit like a nightingale? Occasional figaro?
Song attributes: Melody: improvised melodic, fast, Frequency: 3-8 KHz Special sounds: trill
Only documented observation: 2024-02-17