For the love of trees, on Arbor Day and every day

Two photographs of That Tree
This diptych features two photographs from an iPhone photo-a-day project by Wisconsin photographer Mark Hirsch. An old bur oak tree known as "That Tree" was -- and still is -- the subject of the Hirsch's work. These photographs were created on Day 86 (June 17, 2012), left, and Day 294 (Jan. 11, 2013).
Courtesy Mark Hirsch