Beautiful color and silhouette. I would clone out the slope in the bottom right corner - I adore the tree and would let those long branches with the clusters of leaves at the end really star.
Lovely colours, here, and this looks like it could have been taken in my neighbourhood - immediate in the case of the tree, a little broader as to the steep hillside. Is that a mullock heap by any chance?
I lived in San Diego for 26 years, where there are scads of eucalyptus trees everywhere, and never got a decent picture of one because they're so damn big. This one looks like it's had a long, full life.
Interesting pattern and lovely evening/morning sky. Nice palette. Is this tree typical for its species or has this one lost a lot of branches and foliage along the way?