What is tiny, with a mustache and goes: “Ping!”?
Yes, it is a male Bearded Reedling. Formerly this species was known as the Bearded Tit, but it was renamed after discovering that it was unrelated to other tits, in spite of its appearance.
What comes to housing markets, the Bearded Reedling favours only one type of accommodation: the large reed beds. These birds inhabit the vast reed beds all year round. During winter they feed on the reed seeds.