Tree Bark, possibly cherry or oak © Samantha Buckley

Take 5: Barking Up the Wrong Tree

Winter is a fantastic time to appreciate the beauty and diversity of tree bark. Without the dense foliage of the warmer seasons, it becomes easier to appreciate the unique patterns and textures each species presents.

A few species are fairly easy to identify from their bark, like mature Shagbark Hickories, whose bark peels away in long, narrow, vertical strips that can appear “shaggy” from a distance, hence the name “shagbark.” White Birches, also known as Paper Birches, are also easy to spot with their bright, namesake bark that peels horizontally in thin, papery, white strips.

Others are more tricky to identify by the bark alone—Red Maple is sometimes called the “tree of a thousand barks” due to the high variability in texture, pattern, and color of its bark, ranging from smooth to shaggy to “plated”, sometimes even on the same tree! For most trees, other markers such as branching pattern or the shape of buds or leaf scars can be necessary to make a positive identification (a good field guide is helpful, or you can take a program about tree identification to dive even deeper)—that is, if a species ID is even what you’re after.

But very often it is enough to simply slow down and appreciate the beautiful diversity of tree barks that can be found in even the smallest patches of forest. So, on your next winter nature walk, get curious and turn your focus to the woody “skins” of our native evergreen and deciduous trees with both sight and touch—how many different patterns can you discover?

Here are five photos of tree bark from our annual Picture This: Your Great Outdoors photo contest. You’ll probably notice there are a couple that are not definitively identified in the captions—true to form, many trees are impossible to confidently pin down to species based on bark alone, even for seasoned experts!

Yellow Birch © Dominic Konrad
Yellow Birch © Dominic Konrad
Paper Birch © Bob Dempkowski
Paper Birch © Bob Dempkowski
Most likely an old Sugar Maple © Nicole Nachef
Most likely an old Sugar Maple © Nicole Nachef
Norway Maple (non-native/invasive species but highly ubiquitous) © Matt Cembrola
Norway Maple (non-native/invasive species but highly ubiquitous) © Matt Cembrola
Tree Bark, possibly cherry or oak © Samantha Buckley
Tree Bark, possibly cherry or oak © Samantha Buckley

A Harlequin Duck in Western Mass: Out of Place, or Right at Home?

Harlequin Ducks may not be the rarest ocean-going duck in Massachusetts, but they require a more specific habitat than any other kind of waterfowl: rocky, jagged coastlines with rough surf and abundant shellfish.

In fact, according to eBird, nobody had ever documented Harlequin Ducks more than a couple of miles inland in Massachusetts—until New Year’s Day 2021 when a local birder found a first-year male Harlequin on the fast-flowing Millers River in Turner’s Falls, MA, more than 120 miles away from the coast.  

The rocky Millers River was apparently good enough habitat for this young male Harlequin Duck. Photo © James Smith
The rocky Millers River was apparently good enough habitat for this young male Harlequin Duck. Photo © James Smith

Powerful Rivers are Western Harlequins’ Summer Home

While it’s surprising to see this duck inland in Massachusetts, Harlequins in other parts of the country actually spend half of their lives on fresh water. In the Rocky Mountains and the Cascades of the West, these patchily-distributed ducks breed in fast flowing, whitewater rivers.

The Millers River is well-known among paddlers for its fast current and rough stretches. Not many rivers in Massachusetts have the wide expanses of rapids that Harlequins prefer, making the Millers a likely candidate for our first inland record of this species.

Even Wandering Birds Follow Habitat Guidelines

This sighting is a great example of how rigidly habitat preferences govern  where birds are found, even in cases when birds show up in unusual geographic regions.

Most vagrant birds (that is, birds outside of their normal range) also stick to their usual habitats, or the closest thing they can find. Massachusetts’ last sighting of a Tropical Kingbird, for example, showed up in the brushy fields of Rock Meadow in Belmont—a fair local approximation of the low plains a prefers in the extreme Southwest.

And, true to its name, a Barn Owl that strayed farther north than normal was spotted taking shelter in the rafters of a high-ceilinged wooden garage in Lexington.

Stay in the Know

If you’re interested in following along with the latest unusual sightings, check out our weekly rare bird reports!