Early last year we dove into the study of birds. Svensson's guide became our bible (en-pt-de). Nowadays, it's an immense joy to look around and know who flies like this and who sings like that. The diversity that exists around us is astounding. Today we took on a new subject: trees. The first acquaintance we made was of the crack willow, which welcomed us under its crown while we read the first pages of our new field guide.