White-winged snowfinch / Schneesperling (Montifringilla nivalis)

Wikipedia: White-winged snowfinch Source: OTHER 1200px-Snowfinch.jpg
Classification: Genus Montifringilla; Family Sparrows (Passeridae)
More white and gray than other sparrows, bronw only on back (wings), v. white when flying. almost always 1500m+, eher im Sueden inkl Graubuenden
Vocalization: Rich repertoire. [Link]
Song: Song a staccato, variable phrase, consisting of short burst of sharp chattering in uneven tempo. The timbre is ringing, rich in harmonics and partly rolling. [Link]
Calls: Among the various contact call the commonest are a high-pitched, sharp "zeet", a deeper, Brambling-like "veet, or a sparrow-like "peea". Alarm call a rolling "trr-r-r-rt", resembling Crested Tit. [Link]
Physical details: length=17 cm, wingspan=34-38 cm, weight=35-45 g
Habitats: Mountain

Song: The XC song I downloaded is a faint chirping. Should follow up on song - most talk about calls.
Song attributes: Melody: simple rhythmic, slow, Frequency: 4-6 KHz
🔍 No documented observation