Black guillemot / Gryllteiste (Cepphus grylle)

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Wikipedia: Black guillemot Source: OTHER Tystie1.jpg
Classification: Genus Cepphus; Family Alcidae
This bird appears across the great seas in the following continents: Europe, North America.
Deutschland: seltener Wintergast
Calls: Call surprisingly high pitched. Quite pure, drawn out, plaintive whistling notes in same pitch range as Hazel Grouse. [Link]
Physical details: length=30-32 cm, wingspan=52-58 cm, weight=340-500 g

🔍 No documented observation