Category Archives: General

A jay on the ground near a tree trunk with a leaf in its mouth.

A Blue Jay’s Favorite Snack

On the trunk of an Oak Tree, a squirrel scales the bark in pursuit of a treasured acorn, while a chipmunk nearby already has its cheeks stuffed. Squirrels and chipmunks are the usual suspects for acorn collection, but they have a formidable opponent: the Blue Jay. 

A jay on the ground near a tree trunk with a leaf in its mouth.
Blue Jay

Acorn Frenzy 

Similar to squirrels, Blue Jays cache their acorns and collect a whopping 3,000 to 5,000 acorns in one autumn. And not just any acorns. These skilled jays can determine if the acorn is infested with pesky weevils—a process that still puzzles scientists—by simply picking one up in their beaks. 

Jay popping into view with orange foliage in the background.
Blue Jay © Davey Walters

Blue Jays can hold up to three acorns in the gular pouch located in their throat, along with one in their mouth and one in the tip of their beak, for a total of five acorns per trip. They store the acorns in the ground, and the ones that don’t get eaten by the jay, or any other creature looking for a snack, are left to germinate and grow. Because of this, Blue Jays are often credited with spreading oak tree populations after the last glacial period. 

Dazzling and Intelligent 

Clever, pugnacious Blue Jays are well-known for their territorial behavior and raucous Jay! Jay! call, but they are capable of an amazing array of vocal sounds, including whistles, toots, and wheedle-wheedle calls. Blue Jays can even mimic the scream of a Red-tailed Hawk in order to scare other birds. 

Jay with head turned, displaying its blue wings.
Blue Jay © Alyssa Sklarski

Like all blue birds, Blue Jays are not actually blue! Most of the vibrant feather colors found in birds, like yellow and red, come from pigments in their food that absorb certain wavelengths of light, but no birds (and almost no species in the entire animal kingdom) can produce blue pigments. Instead, the blue color is the result of light refracting off tiny, specialized structures in the bird’s feathers. 

For more information, visit our Quick Guide and our page on Blue Jays

Fall Birding Hotspots

When the heat of summer fades in October, the crispness of fall is a signal to birders to get outdoors and search for fall migratory birds. Don’t know where to start? Check out these birding hotspots at some of our Mass Audubon wildlife sanctuaries. 

Daniel Webster Wildlife Sanctuary, Marshfield 

This unique habitat attracts birders wanting to observe and appreciate a wide variety of bird species. Gone are the breeding Bobolinks that are major contributors to the allure of the sanctuary in summer, but now raptors like Northern Harriers take advantage of flourishing populations of Meadow Voles at Daniel Webster that scurry about in the grasslands. These rodents are the perfect prey for numerous raptors because they don’t hibernate or store food like most other rodents, leaving them exposed during their daytime activities.

Other predators like a Great Horned Owl wait until dusk to prepare for its next hunt. For a chance to hear their deep hoo-hoo calls and possibly even see one, walk along the Secret Trail and look through the groves of Red Maples, Gray Birches, and Red Cedars. 

Great Horned Owl © Scott Creamer

Head to Fox Hill Trail for a glimpse of the Green Harbor River and the occasionally flooded fields, where wintering freshwater ducks often congregate, including Green-winged Teal, pintail, Gadwall, wigeon, shoveler, Mallard, and Wood ducks.  

Drumlin Farm Wildlife Sanctuary, Lincoln 

Migrating birds are hungry birds, and what better place to refuel than in a crop field? At Drumlin Farm, fall is a wonderful time to search between the rows of vegetables or scan the shrubby field edges for sparrows while also keeping an eye on the sky for raptors like Red-tailed Hawks and Sharp-shinned or Cooper’s hawks.  

Bird standing in a meadow.
American Pipit

While you most likely see common species such as crows, American Robins, Cedar Waxwings, Eastern Bluebirds, and American Goldfinches, there is also always a chance you might spot something special like American Pipits. These small, slim birds with white outer tail feathers, a brownish back, and white underparts with brown streaks on their breast can be found in almost any type of open ground habitat. If you spot one searching for food, you’ll notice that it often pumps its tail while trying to find insects and seeds. 

Wachusett Meadow Wildlife Sanctuary, Princeton 

During the fall and winter, a variety of sparrows can be found at Wachusett Meadow. Before going on the trails, stop by the feeders near the Visitor Center to look for White-crowned, White-throated, Chipping, American Tree, Song, or Fox sparrows. With patience and persistence, both Lincoln’s and Swamp sparrows can often be found along the edges of the South Meadow Trail. 

Bird sitting on top of a plant.
Lincoln’s Sparrow © Kevin Bourinot

The Lincoln’s Sparrow can most easily be differentiated from other sparrows by the fine streaking on the buffy breast. When its crown feathers are raised, a Lincoln’s Sparrow’s head appears to have a slight crest. Keep your eyes towards the ground to find them foraging, usually not far from a woody edge where they quickly fly for protection when startled. 

Pleasant Valley Wildlife Sanctuary, Lenox 

From a central point at Pike’s Pond at the Pleasant Valley, many fall migrants often sift through the young forest and wetlands along the edges of the pond. One of the best places to spot birds is from the parking lot, which offers plenty of low shrubs in a nearby wetland where the birds frequently fly across the dirt parking lot to reach the next section of the wetland.  

Black-throated Green Warbler © Kim Nagy

A number of migrant warblers regularly pass through Pleasant Valley, including the Black-throated Green Warbler. These bright, yellow-faced warblers have a black throat that leads into their white underside and olive-green backside, but the ones visible in the fall are often immature and lack the black throat. They often mingle with flocks of other migrant and resident birds.  

Once you’ve checked out these locations, find your next birding spot at another Mass Audubon Wildlife Sanctuary. Tag us in any photos you take on our Facebook and Instagram at @MassAudubon.