Catkins hanging down. Tammisaari archipelago, Finland. Wild. 2008-05-04.

Branches, autumn color. Haaga, Helsinki, Finland. Wild. 2003-10-10.

Flowers and young leaf, in spring. Helsinki, Finland. Wild. 2003-05-13.

Trees. Annala, Helsinki, Finland. Wild. 1999-10-01.

The birches are leafing out, it's spring! Annala, Helsinki, Finland. Wild. 2005-05-13.

Twig with young leaf. Annala, Helsinki, Finland. Wild. 2005-05-13.

Young leaf. Annala, Helsinki, Finland. Wild. 2005-05-13.

Branch, leafing out in spring. Annala, Helsinki, Finland. Wild. 2005-05-13.

Tree in autumn. Annala, Helsinki, Finland. Wild. 1999-09-21.

Tree in winter. Annala, Helsinki, Finland. Wild. 2000-03-01.

Large tree, side view. Tammisaari archipelago, Finland. Planted. 2006-08-02.

Large tree, seen from below. Tammisaari archipelago, Finland. Planted. 2006-08-02.

Tree in autumn. Tammisaari archipelago, Finland. Wild. 2004-10-10.

White trunk and yellow autumn foliage against a blue sky. Tammisaari archipelago, Finland. Wild. 2004-10-10.

Branch in ripe seed, hanging down. Korkeasaari, Helsinki, Finland. Wild. 2004-08-11.

Branch in ripe seed, hanging down. Korkeasaari, Helsinki, Finland. Wild. 2004-08-11.