Red crossbill / Fichtenkreuzschnabel (Loxia curvirostra)

Wikimedia Red Crossbills (Male). Source: WIKIPEDIA Wikimedia Red_Crossbills_(Male).jpg
Classification: Genus Loxia; Subfamily Carduelinae; Family Fringillidae
This bird appears across the great seas in the following continents: Europe, North America, Africa.
Forests with conifers. Some spend the winter in Switzerland, others are here year-round.
Appearance and identification: Nabu.de: das Männchen schon von weitem durch seine ziegelrote Farbe auf. Das Weibchen dagegen ist unscheinbar graugrün gefärbt.Größe: 15 bis 17 Zentimeter Zugtyp: Teilzieher Beobachtungszeitraum: Oktober bis April, im Mittelgebirge und Alpenraum ganzjährig. [Link]
New research suggests that there may be as many as eight different full species of Red Crossbills on [North America]. [Link]
Behavior: Wikipedia: a small passerine bird in the finch family Fringillidae, also known as the Common Crossbill in Eurasia. Crossbills have distinctive mandibles, crossed at the tips, which enable them to extract seeds from conifer cones and other fruits. [Link]
Song: The song consist of improvised, resonant twittering, and series of contact calls with no apparent phrases. It is generally faster, with less marked pauses than in Parrot Crossbill, and the phrasing seems more random. [Link]
Calls: Contact call similar to Parroy Crossbill's "tupp", but is on average higher and less powerful, with a "cut-off" ending. In sum: Parrot Crossbill; hard attack, soft ending, Crossbill: softer attack, cut-off ending. Beware regional variations and overlap in pitch of calls with Parrot. [Link]
Physical details: length=16 cm, wingspan=27-30 cm, weight=35-50 g
Habitats: Forest

Song: Repeated hi-low pattern...well, doesn't always sound like that. The very short beginning of my Stazersee recording before the static sets in does, as well as a song found online. One recording reminds me of cicada sounds.
Song attributes: Melody: stereotype melodic, slow, Frequency: 2-10 KHz
Call: Automatically generated from Xeno-Canto recording

♫ Source: BirdNet 20200613_122851 birdnet 641 near stazersee - Red crossbill.mp3 2020-06-13 12.28.51 Sils (song?)

First documented observation : 2020-06-13 in Sils.