New! SVT Trail Guide: 40 Walks West of Boston

Nature Sightings

Welcome to Nature Sightings. Here, we post nature sightings that have been reported to us throughout the Sudbury, Assabet and Concord Rivers Valley. If you would like to receive weekly e-mails summarizing the latest additions to Nature Sightings, subscribe to our free e-list.  This is a good way to make sure you never miss a new entry, especially for Camera in the Woods photos, which often come in later than other photos and don't appear on top of the list below.  If you have an interesting sighting, picture or video you would like to share, e-mail Dan Stimson

Latest Sightings:

Snowdrops in Sudbury

Sighting Date: 
April 29, 2015
Snowdrops in Sudbury, photographed by Helen du Toit.
Helen du Toit photographed snowdrops emerging from a long winter in Sudbury.
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Nature at Wolbach Farm

Sighting Date: 
March 31, 2015
An eastern chipmunk at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.A mourning dove at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.
Jesse Koyen photographed an eastern chipmunk and a mourning dove at SVT's Wolbach Farm in Sudbury.
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Backyard Birds in Stow

Sighting Date: 
March 31, 2015
Downy woodpeckers in Stow.Grackles and red-winged blackbirds in Stow.A northern cardinal and an American tree sparrow in Stow.Northern cardinals in Stow.
Steve from Stow photographed downy woodpeckers, common grackles, red-winged blackbirds, northern cardinals and an American tree sparrow in his back yard.
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Birds at Wolbach Farm

Sighting Date: 
March 30, 2015
A Carolina wren at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.A fox sparrow at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.A fox sparrow at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.A fox sparrow at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.
Jesse Koyen photographed a Carolina wren and a fox sparrow with a worm at SVT's Wolbach Farm in Sudbury.
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Ring-necked Ducks in Lincoln

Sighting Date: 
March 29, 2015
Harold McAleer recorded this video of ring-necked ducks on the Sudbury River in Lincoln.
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Birds in Southborough

Sighting Date: 
March 26, 2015
Canada geese in Southborough, photographed by Sandy Howard.Canada geese in Southborough, photographed by Sandy Howard.Mute Swans in Southborough, photographed by Sandy Howard.
Sandy Howard photographed Canada geese and mute swans in Southborough.
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American Robin and Red-bellied Woodpecker in Framingham

Sighting Date: 
March 26, 2015
An American robin in Framingham, photographed by Joan Chasan.A red-bellied woodpecker in Framingham, photographed by Joan Chasan.
Joan Chasan photographed an American robin at her bird feeder and a red-bellied woodpecker in her Framingham back yard. 
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Dark-eyed Junco and Eastern Bluebirds in Sudbury

Sighting Date: 
March 26, 2015
A dark-eyed junco in Sudbury, photographed by Lisa Eggleston.An eastern bluebird in Sudbury, photographed by Lisa Eggleston.Eastern bluebirds in Sudbury, photographed by Lisa Eggleston.
Lisa Eggleston photographed a dark-eyed junco and eastern bluebirds in her Sudbury back yard.
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Birds along the Sudbury River

Sighting Date: 
March 25, 2015
Hooded mergansers on the Sudbury River in Sudbury, photographed by Lisa Eggleston.A mallard on the Sudbury River in Sudbury, photographed by Lisa Eggleston.Hooded mergansers and mallards on the Sudbury River in Sudbury, photographed by Lisa Eggleston.A mute swan on the Sudbury River in Sudbury, photographed by Lisa Eggleston.Mute swans on the Sudbury River in Sudbury, photographed by Lisa Eggleston.A ring-necked duck on the Sudbury River in Sudbury, photographed by Lisa Eggleston.
Lisa Eggleston photographed hooded mergansers, mallards, mute swans, and a ring-necked duck on the Sudbury River in Sudbury.
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Signs of Spring at SVT's Wolbach Farm

Sighting Date: 
March 25, 2015
Crocuses at SVT's Wolbach Farm in Sudbury, photographed by Dan Stimson.
Dan Stimson photographed these crocuses at SVT's Wolbach Farm in Sudbury.
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Woods Ducks in Lincoln

Sighting Date: 
March 25, 2015
Harold McAleer recorded this video of wood ducks on the Sudbury River in Lincoln.
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Birds in Concord

Sighting Date: 
March 24, 2015
A common merganser on the Sudbury River in Concord, photographed by Terri Ackerman.House finches in Concord, photographed by Terri Ackerman.A mourning dove in Concord, photographed by Terri Ackerman.A wood duck on the Sudbury River in Concord, photographed by Terri Ackerman.Wood ducks on the Sudbury River in Concord, photographed by Terri Ackerman.Black ducks on the Sudbury River in Concord, photographed by Terri Ackerman.A Carolina wren in Concord, photographed by Terri Ackerman.A hooded merganser on the Sudbury River in Concord, photographed by Terri Ackerman.A northern cardinal in Concord, photographed by Terri Ackerman.
Terri Ackerman photographed a common merganser, house finches, a mourning dove, wood ducks, black ducks, a Carolina wren, a hooded merganser, and a northern cardinal in Concord.
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Common Mergansers on the Sudbury River

Sighting Date: 
March 19, 2015
Common mergansers on the Sudbury River in Lincoln, photographed by Harold McAleer.
Harold McAleer photographed these common mergansers on the Sudbury River in Lincoln.
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Red-winged Blackbirds and Brown-headed Cowbirds in Stow

Sighting Date: 
March 19, 2015
20150319_Red-winged Blackbirds_Steve.JPGRed-winged blackbirds and brown-headed cowbirds in Stow.
Steve from Stow photographed a flock of red-winged blackbirds with brown-headed cowbirds mixed in.
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Red-winged Blackbird at SVT's Wolbach Farm

Sighting Date: 
March 16, 2015
A red-winged blackbird at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.A red-winged blackbird at SVT's Wolbach Farm in Sudbury, photographed by Jesse Koyen.
Jesse Koyen photographed this red-winged blackbird at SVT's Wolbach Farm in Sudbury.
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Purple Loosestrife Bio-Control Project

Sighting Date: 
March 11, 2015
Purple Loosestrife, as photographed and submitted to Nature Sightings in 2012 by Harold McAleer.Marlborough High School students helped SVT raise Galerucella beetles in a similar effort in 2010.
Our wetlands are being severely threatened by purple loosestrife (Lythrum salicaria). Purple loosestrife is a highly invasive, perennial aquatic plant that grows from persistent roots. The annual stems can reach 9 feet tall and form a crown that can be up to 5 feet wide. The showy, magenta flowering stems end in a 4-16 inch flowering spike. 
In the mid to late 1800’s, purple loosestrife traveled to northeastern port cities as ship ballast from European tidal flats. When this ballast was dumped for the return trip to Europe, a major seed source remained along the eastern seaboard. For the next 100 years it was a pioneer species while it acclimated to the northeastern seaboard and the St. Lawrence Seaway.
Purple loosestrife outcompetes native vegetation and can quickly adapt to environmental changes. Wildlife and birds of all kinds are displaced from wetland habitat when they lose their food source, nesting material, and ground cover.
In order to preserve wetland ecosystems, many organizations across the country have initiated a purple loosestrife biological control program. Biological control is the control of an invasive species using a natural predator. These programs have had success in lowering the density and slowing the spread of purple loosestrife. The most popular biological control agent for purple loosestrife is Galerucella beetles. These beetles eat and breed specifically on purple loosestrife. 
SVT is participating with a purple loosestrife bio-control project in 2015. The program is being coordinated by the SuAsCo CISMA (Cooperative Invasive Plant Management Area). CISMA is a partnership of private and government conservation organizations working together to combat invasive species in our watershed. We are looking for volunteers to help raise these beetles. For more information please visit our Volunteer Page.
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Eastern Chipmunk in Sudbury

Sighting Date: 
March 10, 2015
An eastern chipmunk in Sudbury, photographed by Helen du Toit.An eastern chipmunk in Sudbury, photographed by Helen du Toit.
Helen du Toit photographed this eastern chipmunk in her Sudbury back yard on two different days.
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Birds in Marlborough

Sighting Date: 
March 9, 2015
An American goldfinch in Marlborough, photographed by Vin Cerrati.A dark-eyed junco in Marlborough, photographed by Vin Cerrati.A black-capped chickadee in Marlborough, photographed by Vin Cerrati.A downy woodpecker in Marlborough, photographed by Vin Cerrati.Common mergansers in Marlborough, photographed by Vin Cerrati.
Vin Cerrati photographed an American goldfinch, a dark-eyed junco, a black-capped chickadee, a downy woodpecker and common mergansers in Marlborough.
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White-tailed Deer in Ashland

Sighting Date: 
March 7, 2015
A white-tailed deer in Ashland, photographed by Judy Eneguess.
Judy Eneguess photographed this white-tailed deer in Ashland.
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Red Fox in Marlborough

Sighting Date: 
March 6, 2015
A red fox in Marlborough, photographed by Ginny Hutchison.A red fox in Marlborough, photographed by Ginny Hutchison.
Ginny Hutchison photographed this red fox beneath her backyard bird feeder in Marlborough.
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