Parrot crossbill / Kiefernkreuzschnabel (Loxia pytyopsittacus)

Wikipedia: Parrot crossbill Source: OTHER 1200px-Loxia_pytyopsittacus%2C_Budby_Common_3.jpg
Classification: Genus Loxia (Loxia); Subfamily Carduelinae (Carduelinae); Family Fringillidae (Fringillidae)
General: The parrot crossbill (Loxia pytyopsittacus) is a small passerine bird in the finch family Fringillidae. It breeds in pine forests in northern and northeastern Europe. [more]
Song: The song consist of improvised, resonant twittering and series of contact calls with no apparent phrases. It is generally slower than in Crossbill, with marked pauses. [Link]
Calls: Contact call similar to Crossbill's "chepp", but is on average deeper and lacks the "cut-off" ending of each call. In sum: Parrot Crossbill; hard attack, soft ending, Crossbill: softer attack, cut-off ending. [Link]
Physical details: length=17 cm, wingspan=30-33 cm, weight=48-61 g

🔍 No documented observation