Common firecrest / Sommergoldhähnchen (Regulus ignicapilla)

Sommergoldhähnchen, bever - oder wintergoldhähnchen - fliegt weg. 2021-07-28 17:32:06 Engadin NIKON D5600 ISO 1600
Exposure 0.002
Classification: Genus Regulus (Regulus); Family Old world warblers (Sylviidae)
Together with the goldcrest, the smallest bird in Switzerland.
Although they migrate, a few are reported in winter together with the goldcrest, which stays at home
I heard one in the woods by Neschwil. Unfortunately, they prefer perches in the tops of trees, which were 30m or more tall - little chance of seeing one, even if we had lingered.
Vocalization: A slow crescendo of short "tze" sounds in a phrase rising slightly in pitch, without the repeated arpeggiated movements of goldcrest. [Link]
Song: Wie [beim Wintergoldhähnchen] aber auf gleicher Tonhöhe bleibend. [Link]
Song: Similar in timbre to Goldcrest, but much more monotonous. [Link]
Calls: „sisisi“ [Link]
Call: a thin "tsi tsi tsi" similar to Goldcrest, but not so sharp. [Link]
Physical details: length=9 cm, wingspan=13-16 cm, weight=4-6 g
Habitats: Forest

Song: Very high rhythmic repetition of about 3 seconds
Song attributes: Mnemnoic: Noten vom 'Sommer' steigen wie die Temperaturen Melody: simple rhythmic, fast, Frequency: 6-8 KHz
First documented observation: 2020-05-09 in Luppmen. Most recent observation: 2024-06-02 in Levanto.