In February, when it’s still frigid at night but daytime temperatures are starting to warm, it may look like trees are just sitting their doing nothing — but inside their cells, changes are happening and sap is starting to flow, explains Bowdoin professor and Maine Audubon trustee Nat Wheelwright in his latest video.
Nature Moments are filmed with the help of Wilder Nicholson, Rebecca Goldfine, Tom Porter, Paul Benham and Genie Wheelwright.
View all Nat’s Nature Moments videos.
