Someone sent us this charming, incisive, bitter-sweet graphic about a eucalyptus tree. This tree, such an important part of the ecosystem – a shelter for birds, a splendid carbon sink, a catcher of fog – ponders its purpose in life. Like the trees on Mt Sutro and Mt Davidson, it’s 125 years old.

The artist, Charlotte Hildebrand, kindly gave us permission to reproduce it here.