Arctic warbler / Wanderlaubsänger (Phylloscopus borealis)

Wikipedia: Arctic warbler Source: OTHER Arctic_Warbler_4683b.jpg
Classification: Genus Phylloscopus; Family Phylloscopidae
This bird appears across the great seas in the following continents: Europe, North America, Asia, Australia.
vagrant
Song: Call and song diagnostic. Song a rattling series of 20-30 single syllables. Repeated as a monotonous phrase in stable pitch, lasting 2-4 seconds. Starts more softly with volume rising throughout each phrase. Often given as introductory part of song. [Link]
Calls: Contact call equally unique. A hard and short "tsrrt", recalling contact call of Dipper. [Link]
Physical details: length=10-11 cm, wingspan=16-22 cm, weight=8-12 g

🔍 No documented observation