Markus Varesvuo / Siberian Tit (Poecile cinctus) on conifer branch, Finland, January

Markus Varesvuo / Siberian Tit (Poecile cinctus) on lichen-covered branch, Kuusamo, Finland, March

Staffan Widstrand / Siberian chickadee (Parus / Poecile cinctus) boreal Taiga forests, Ovre Pasvik National Park, Norway

Staffan Widstrand / Siberian chickadee (Parus / Poecile cinctus) boreal Taiga forests, Ovre Pasvik National Park, Norway

Nick Upton / Felled Aspen (Populus tremula) trees with tit nests in hollows. Treeholes suitable for Siberan flying squirrel (Pteromys volans). Near Lisaku, Estonia. April 2018.

Nick Upton / Felled Aspen (Populus tremula) trees with tit nests in hollows. Treeholes suitable for Siberan flying squirrel (Pteromys volans). Near Lisaku, Estonia. April 2018.

Erlend Haarberg / Siberian tit (Poecile cinctus) with bokeh effect, Jokkmokk, Sweden, November.

Ralph Martin/ BIA / Siberian Tit (Poecile cinctus), Finland

Ralph Martin/ BIA / Siberian Tit (Poecile cinctus), Finland

Orsolya Haarberg / Photographer Erlend Haarberg, with a Siberian tit (Poecile cinctus) on his hand. Laponia / Swedish Lapland.

Jussi Murtosaari / Siberian tit (Parus cinctus), perched, Finland, January.

Jussi Murtosaari / Siberian tit (Parus cinctus), perched, Finland, January.