A small wetland-passerine, similar to a tit. They have a round body and a short tail, and they live in willow brushes, on riversides, and in bush meadows. Characteristically, they have a grey head, a black mask (male birds have a darker mask), a reddish-brown back, a dark reddish-brown spot on the wing, and a yellowish underside. The nests of Eurasian penduline tits are whitish, elongated, and spherical closed pouches, hanging from the top of small branches, with a tube-shaped pendant – the entrance tunnel – on one side. This complex and durable nest is made of plant fibres and wool and can last for several years. Completing a nest can take up to several weeks. In Estonia, the Eurasian penduline tit is a rare and a rather recent immigrant from the south. The first known nesting in Estonia was in the Matsalu Nature Conservation Area in 1954 or 1955.