WILLISTOWN CONSERVATION TRUST

  • Facebook
  • Instagram
  • LinkedIn
  • YouTube
DONATE
  • About
    • HOW WE WORK
    • WHERE WE WORK
    • OUR STAFF AND TRUSTEES
    • JOBS & INTERNSHIPS
    • VOLUNTEER
    • RUSHTON CONSERVATION CENTER
    • STRATEGIC PLAN
    • DIVERSITY, EQUITY & INCLUSION STATEMENT
    • FAQs
  • LATEST
    • BLOG
    • IN THE NEWS
    • PUBLICATIONS
    • PHOTOS
  • PROGRAMS
    • BIRD CONSERVATION
    • COMMUNITY FARM
    • EDUCATION
    • LAND PROTECTION
    • STEWARDSHIP
    • WATERSHED PROTECTION
  • NATURE PRESERVES
    • ASHBRIDGE PRESERVE
    • HARTMAN MEADOW
    • KESTREL HILL PRESERVE
    • KIRKWOOD PRESERVE
    • RUSHTON WOODS PRESERVE
  • EVENTS
    • EVENT CALENDAR
    • BARNS & BBQ
    • RUN-A-MUCK
    • WILDFLOWER WEEK
    • ECOCENTRIC EXPERIENCE
    • RUSHTON NATURE KEEPERS (RNK)
    • ACCESS Program
  • Support
    • WAYS TO GIVE
    • SPONSOR THE TRUST
    • CORPORATE PARTNERSHIP PROGRAM
    • JOIN THE SYCAMORE SOCIETY
    • LEGACY SOCIETY & PLANNED GIVING
    • DELCO Gives 2025
  • CAMPAIGN FOR KESTREL HILL PRESERVE

Community Supported Avifauna

October 22, 2019 By Blake Goll

Volunteer, Kelly Johnson, in awe of a Blue Jay banded October 10th. Photo by Blake Goll

Rushton Woods Preserve is a place where people gather in celebration of abundance. Community Supported Agriculture (CSA) members gather for their share of the soil’s bounty each week, and myriad groups from the community, schools, and universities gather at the songbird banding station to witness the bounty of the sky. Much like the agricultural harvest, our bird catch follows seasonal patterns that can help a visitor (or bird bander) develop a deep connection to the rhythm set forth by Earth’s 23.5 degree tilt.

View of Rushton Farm in Fall from Fred’s wagon. Photo by Blake Goll

As this was my first year participating in the Rushton Farm CSA, I noticed some interesting correlations between the harvest and the catch. My favorite crisp spring vegetables like kale, radishes, turnips, broccoli, leeks, and little gem lettuces have all made an encore appearance now that the cool fall weather is here. These I liken to our butterflies of the bird world, the “special” warblers, that we can only expect to see during spring and fall migration: Black-throated Blue Warblers, Chestnut-sided Warblers, Magnolia Warblers, Northern Parulas, Black-and-white Warblers, and American Redstarts.

  • American Redstart banded in September. Photo by Blake Goll
  • Black-and-white Warbler banded in October. Photo by Celeste Sheehan
  • Male Chestnut-sided Warbler banded in September. Photo by Blake Goll
  • Northern Parula banded in September. Photo by Jim Moffett
  • Black-throated Blue Warbler banded in September. Photo by Jim Moffett

Throughout the summer, I was overwhelmed with tomatoes and zucchini. These prolific crops mirror our common birds that breed at Rushton all summer long like Gray Catbirds and Common Yellowthroats. Catbirds are a bander’s tomatoes making up the bulk of our catch August through September; they even ironically dwindled in numbers at about the same time as the tomato harvest finally ended a couple of weeks ago. And just like the tomatoes, we miss them when they’re gone.

Rushton Nature Keeper releasing a banded Gray Catbird October 10th. Photo by Blake Goll

Now CSA members are enjoying the hardy winter produce like squash and sweet potatoes, while our avifauna has shifted to tough winter birds from the north like White-throated Sparrows, kinglets, and Hermit Thrush.

  • First White-throated Sparrow of the season (10/1) Photo by Celeste Sheehan
  • Golden-crowned Kinglet Oct 16th. Photo by Celeste Sheehan

Recent highlights include a young male Rose-breasted Grosbeak on October 10th, our third Yellow-breasted Chat on October 1st (thanks to our new reduced mowing regime), a couple of young female Sharp-shinned Hawks in September, and a young male Scarlet Tanager on September 23rd.

  • Rose-breasted Grosbeak banded October 10th. Photo by Blake Goll
  • Yellow-breasted Chat (third of the season!) banded October 1. Photo by Jim Moffett.
Young female Sharp-shinned Hawk banded September 17. Photo by Jessica Shahan.
Young male Scarlet Tanager banded September 23. Photo by Blake Goll

Black-throated Blue Warbler numbers are back up this year from our previous year’s alarming slump. One little female got our silverware on October 1st and decadently dined for five days, increasing her body weight by 22%. A handsome male Black-throated Blue checked in on October 10th as our one-thousandth bird of the season, making this fall our most productive yet by almost double our past records.

Our 1,000th bird banded of the season on October 10th: a Black-throated Blue Warbler. Photo by Jodi Spragins

This local boom may seem peculiar in the wake of the recent article in Science, citing the devastating loss of 3 billion birds in the past 50 years as a result of habitat loss, pesticides, climate change, and other human threats. However, the majority of our birds are hatch year birds that have yet to complete the most perilous journey of their lives: their first migration in the Anthropocene. Thank goodness we can offer them temporary sanctuary within a community of people who care about open space and the abundance it supports.

There’s a lot going on in the woods,

Blake

The Rushton banding crew with No.1,000 (a Black-throated Blue Warbler). Photo by Jodi Spragins

Filed Under: Bird Banding, Bird Conservation, Farm Tagged With: Bird banding, Black-throated Blue warbler, Community supported agriculture, CSA, fall migration, Scarlet Tanager, Sustainable Agriculture

If Black-throated Blues are Here, Fall is Near

August 30, 2018 By Blake Goll

Black-throated Blue Warbler banded at Rushton Woods Preserve this spring.  Photo by Blake Goll/Staff

Even though the autumn equinox has not yet occurred and you’re still wistfully packing your bags for one last summer fling at the beach this weekend, billions of songbirds have started the silent nocturnal procession south.  Though we are not lucky enough to be graced by the steely gray tuxedos of the dapper Black-throated Blue Warbler during their nuptial season, they are one of the first warblers to appear at Rushton during fall migration.  After nesting in higher elevations of mixed hardwood and evergreen forests — the kind with yellow birch towering over thick tangles of mountain laurel and rhodedendron— they often gravitate toward early successional shrubby areas with their “teenage” offspring.  Consequently, these young birds probably recognize these types of shrubby habitats as safe havens during their first migration.
Rushton got shrub. The hedgerows of Rushton where we operate fourteen mist nets  are largely composed of early successional habitat.  Maybe that’s why we often get the younger, what we call Second Year or Hatch Year, Black-throated Blues.  These have greenish edging on some of the feathers and feather coverts as compared to the entirely blue edged adults.  Compare the two photos below of the older male we caught in spring and the younger male we caught this morning.  Can you tell the difference?  If not, you would not make a good female songbird; you must know when to swipe left on a sub-par mate by looks alone.  Yes, the natural world is a place of unforgiving vanity.

Young (Hatch Year) Black-throated Blue Warbler banded at Rushton today (8/30/18). Photo by Blake Goll/Staff

Adult (After Second Year) Black-throated Blue Warbler banded at Rushton in May 2018. Photo by Blake Goll/Staff

On this steamy opening day of our fall banding season, we also blinged out, skulled, and aged many young Gray Catbirds, Wood Thrush, Common Yellowthroats, American Robins, and a lovely American Goldfinch.  We watched the mercury closely and closed early to keep our birds cool and safe.  Still our total was 15 new birds of 7 species.

Ageing a Gray Catbird today (8/30) at Rushton. Photo by Blake Goll/Staff

Alison skulling a Gray Catbird today. In other words, she is looking through the transparent skin under the feathers to determine the level of ossification of the skull, which corresponds to age. Photo by Blake Goll/Staff

Ageing a Wood Thrush today at Rushton. Photo by Blake Goll/Staff

Join the fun Tuesday and Thursday mornings at Rushton Woods Preserve now until November 1 from sunrise until about 11 am.
There’s a lot going on in the woods,
Blake
 

Filed Under: Bird Banding, Bird ecology, migration Tagged With: Bird banding, Black-throated Blue warbler, early successional shrub habitat, fall songbird migration, Rushton Farm

Mid-Morning Shower Yields a Pot of Avian Gold at the End of a Rainbow

October 1, 2012 By Communications Team

Female Common Yellowthroat
Female Common Yellowthroat. Photo by Blake Goll.

The air was thick, sticky and unseasonably warm on Wednesday, not at all the kind of crisp air that brings a flurry of fall feathers to our nets.  We were hosting a handful of very enthusiastic children who had off from school for Yom Kippur,  so we were wishing for some yellow warblers to brighten the otherwise meager catch of Gray Catbirds, Song Sparrows and wrens.  However, we did catch our 15th Swainson’s Thrush of the season and the second White-throated Sparrow of this autumn, which is an exciting indicator of the beginning of the next chapter of fall migration.

Swainson's Thrush.  Photo by Gloria Ives.
Swainson’s Thrush. Photo by Gloria Ives.

White-throated Sparrow.  Photo by Blake Goll.
White-throated Sparrow. Photo by Blake Goll.

Finally, a couple of lovely Magnolia Warblers graced our audience with their bright plumage, and we were satisified with that.  There were plenty of birds for the visitors to study, and they were able to see many ageing and sexing criteria for different species.  We thanked the maggies, the kids ooed and awed over a spritely Black-and-White Warbler, and we settled in for the rest of what we expected to be a dull morning (we spoiled banders are never satisfied!).

Magnolia Warbler (adult male).  Photo by Blake Goll.
Magnolia Warbler (adult male). Photo by Blake Goll.

Ageing a Magnolia Warbler by the shape of tail spots.
Ageing a Magnolia Warbler by the shape of tail spots.

Visitors observing bird banding.
Visitors observing bird banding.

Plip. Plop. Drip. Drop. Suddenly a cloud looming above decided to burst open even in the unabated presence of the sun.  After a few minutes of this bizarre weather, we thought we’d better check the nets.   As we trekked around to all the nets, most of which were empty, the rain subsided as abruptly as it started.  We rounded the corner of the hedgerow to check one of the last nets, net 10, and there was our pot  o’ gold at the end of the rainbow!  Rain drops sparkled on the net as it sagged and bounced under the weight of 10 wiggly pairs of wings, including two golden beauties- a Nashville and a Tennessee Warbler, appropriately sticking together.  Birds of the same state stick together?

Nashville Warbler (male). Photo by Blake Goll.
Nashville Warbler (male). Photo by Blake Goll.

Sexing the Nashville Warbler by the extent of red feathers on the crown.  This is a male.
Sexing the Nashville Warbler by the extent of red feathers on the crown. This is a male.

Tennessee Warbler (hatch year).  Photo by Blake Goll.
Tennessee Warbler (hatch year). Photo by Blake Goll.

Wilson's Warbler being extracted from net.  Photo by Blake Goll (taken in Oregon).  We banded a Wilson's Warbler at Rushton 2 weeks ago.
Wilson’s Warbler being extracted from net. Photo by Blake Goll (taken in Oregon). We banded a Wilson’s Warbler at Rushton 2 weeks ago.

Other goodies in our jackpot included two Red-eyed Vireos, Black-throated-Blue Warblers, a Magnolia Warbler and Tufted Titmouse.  This great catch could have just been a coincidence,  but more likely these were birds that were foraging high in the canopy or at the edge of the woods and dove for cover in the underbrush of the hedgerow when the rains came.  Sometimes trapped titmice make such a fuss that they lure other birds into the net, but we didn’t hear anything from the banding table, which is fairly close to Net 10.  We need a little shower of rain and birds like that every day we are out there!  This week, we will commence daily rain dances.

Male Black-throated blue Warbler (hatch year).  Photo by Blake Goll.
Male Black-throated blue Warbler (hatch year). Photo by Blake Goll.

Female Black-throated Blue Warbler
Female Black-throated Blue Warbler

The total number of birds caught last week (2 banding days) was 92, including those mentioned above plus the first of the year White-throated Sparrow, a Gray-cheeked Thrush, a Brown Thrasher, Ovenbird, Common Yellowthroat, Field Sparrow, Eastern Towhee and an American Goldfinch.  In the hedgerows, but not the nets, were American Woodcocks, Scarlet Tanager, Philadelphia Vireo and Red-breasted Nuthatch.

Cathy Staples and Common Yellowthroat.
Cathy Staples and Common Yellowthroat.

A hawk or Philadelphia Vireo or Red-breasted Nuthatch spotted during banding session.  Photo by Blake Goll.
A hawk or Philadelphia Vireo or Red-breasted Nuthatch spotted during banding session! Photo by Blake Goll.

Be on the look out for Red-breasted Nuthatches (RBNUs) at your feeder, in your yard or wherever you bird.  As a result of a coniferous cone crop failure in the northeast (they eat the seeds of pinecones), many RBNUs are leaving their northern haunts to find better seed sources to the south for the winter.  Others will remain in northwestern Ontario where the cone crops are much better.  Additional northern birds like Common Redpolls might also show up in our area this winter for similar reasons related to the white birch seed crop in the north.  Read the Winter Finch Forecast on the American Birding Association’s website for information about other irruptive finch species.

Red-breasted Nuthatch from Cornell Lab of Ornithology "All about Birds" website.
Red-breasted Nuthatch from Cornell Lab of Ornithology “All about Birds” website.  Here they describe this nuthatch as “an intense bundle of energy at the feeder.”

Reminder: Keep your hummingbird feeders up and your salvia shielded from the frost at least through Thanksgiving! Other vagrants headed our way that could show up in your yard include Rufous Hummingbirds and other western species of hummers.  These guys usually don’t appear until October, November or even December long after the Ruby-throats have gone.  Ever-warmer winters are making the east perfectly hospitable to these vagrant western hummingbirds who are surviving and passing on their somewhat mutant genes to their offspring, which will follow in their parents’ wingbeats migrating from the west to the east instead of south for the winter.  Hence, new migration routes for western hummers are emerging right before our eyes!

A Rufous Hummingbird.  Photo by Blake Goll.  This is one of my photos from banding in Washington state.  Don't worry, hummer freeze like this and "play dead" when caught.  She was fine and flew off with a nudge.
A Rufous Hummingbird. Photo by Blake Goll. This is one of my photos from banding in Washington state. Don’t worry, hummers freeze like this and “play dead” when caught. She was fine and flew off with a nudge.

Visit Scott Weidensaul’s website for more details about this new movement of western hummers and how to become part of the hummer banding study if you find one in your yard this fall or winter.  Psst….I hear these western wanderers really like Pineapple sage if you have any of that.

Northern Saw-whet Owl.  Photo by Adrian Binns.
Northern Saw-whet Owl. Photo by Adrian Binns.

Those fuzzy balls of cute fury are winging their way toward us at a faster pace than ever before.  Saw-whet banders north of us are saying things like, “No one will sleep this Autumn,”  and, “Sawweet dreams southern banders!”  Kestrel Haven Avian Migration Observatory in Burdett, NY (between Ithaca and Watkins Glen at the south end of the two biggest Finger Lakes) has alreay netted four hatch year Northern Saw-whet Owls as of September 27th, the first they have ever banded in September.

This is an irruptive species, whose major movements south depend on an adundance of voles during the northern boreal breeding season.  It’s been said that this summer was a good one for the little owls, so there are many  additional “kids” who will be spilling south this fall.  Stay tuned for our official public owl banding start date, but think mid-October…. In the meantime, public songbird banding continues every Tuesday and Thursday mornings at Rushton, 6am-11am (unless it’s raining).  Hope to see you at the station!

There’s a lot going on out there,

~Blake

View from the Willistown Conservation Trust's Run-a-Muck course.
View from the Willistown Conservation Trust’s Run-a-Muck course. Photo by Blake Goll.

Filed Under: Bird Banding, Owls Tagged With: Bird banding, Black-throated Blue warbler, Nashville warbler, northern saw-whet owl banding, rufous hummingbird migration, Tennessee warbler

Screech Owl Steals the Stage and Compost Pile Attracts a Pile of Birds!

September 23, 2011 By Communications Team

Black throated Blue warbler
Young male Black-throated Blue Warbler. Notice the greenish hue to his back. This indicates he was born this summer.

Hello Everyone,

Here is our banding update for the past 2 weeks of Fall Migration Banding thus far.   Sorry for the delay, but we have been up to our ears in rain and getting ready for the Run-a-Muck, which is still on for tomorrow rain or shine, from 2- 6 PM ish.  Check out our website for more information about this delightful countryside bash!

Blake with Eastern Screech Owl
Me (Blake) with the Eastern Screech Owl at Rushton Woods Preserve.

The following is our official banding update written by our magnificent Master bander, Doris McGovern:

Friends of Rushton Banding,

We began our 2011 fall season weeks later than 2010.  August’s never-ending rain filled our net lanes with standing water and made it unsafe for birds and impossible for banders to work.  That’s why you haven’t heard from us until now.

Eastern Screech Owl
This young Eastern Screech Owl was born in Rushton Woods this spring.

However, when we finally got underway we caught the cutest gray phase Eastern Screech Owl I’ve ever seen.  Its plumage was an intricate bark-like camouflage pattern with subtle gray shadings, streaks and contrasts.  This young bird was so cooperative; there were more than a few visitors who would have been happy to have it as a pet.  We don’t anthropomorphize (attribute human personality to things not human) very often, but this little guy or gal came very close to being adopted.  This is our second Screech Owl.  The first, an adult red-phase, was caught late at night during Saw-whet Owl banding in 2010.  Only Lou Hahn and I saw that bird, but this little owl was seen by lots of visitors.  Children were wide-eyed.  These owls are quite common even in suburbia.  If you haven’t seen or heard one, check out http://www.owlpages.com/owls.php?genus=Megascops&species=asio

Connecticut Warbler
This male Connecticut Warbler graced Rushton with his fleeting presence last week.

Last fall we caught six Connecticut Warblers, an amazing feat since these illusive warblers, skulkers in fields and low vegetation, are rarely seen by even the most avid bird watchers.  Last week on the 16th we caught our first Connecticut, an attractive male with a gray hood.  A female followed this week (Tuesday the 20th) and we could get a few more of these warblers if it ever stops raining.  Thirteen warbler species netted so far this season include Worm-eating, Wilson’s, Black-throated Blue, Prairie, and lots of American Redstart and Magnolias.   Of course, we enjoy all the vireos, thrushes and woodpeckers that live in and stop over at Rushton Preserve as well.

Northern Flicker
This Northern Flicker is a resident of Rushton.

Our catch for the past 2 weeks  has been very good with no total below 28 birds and one as high as 57.  On Wednesday Godefroy, a post doc at Penn from Burgundy, suggested setting a net near the farm’s compost piles where we often see birds flitting about as we are leaving.  The birds glean insects and seeds from the rows of vegetables and use the hedgerow for shelter.  Lou and Godefroy set the net late in the day, but within half an hour, we caught 15 birds including Field and Chipping Sparrows, Indigo Buntings and wrens.  While the sparrow migration is on, this could become our best net.

Young female Canada Warbler
This young female Canada Warbler was one of our first migrant warblers this season.

Members of ’PA Young Birders’ will attend a banding session scheduled just for them next Thursday, September 29th from 9-11 am.  This program was very successful last fall when over 40 youngsters from 7-17 attended and were overwhelmingly excited by the experience.  If you have a youngster or know a young person who would be interested in learning about birds, contact Lisa Kiziuk (lkr@wctrust.org)  for a schedule of the fun birding and nature programs that she and Blake Goll (bhg@wctrust.org) have prepared.

See you in the woods,

Doris McGovern

Blogster Blake here again.  I just want to emphasize how exciting it was to have all those 15 birds in the “compost net!”  Lisa is the one who found them all in the net by herself as we were closing up.  She quickly called for reinforcements, and Doris drove her car right up to the net from the banding station!    After helping Lisa to extract all 15 birds,  she drove the birds back to the banding table for speedy delivery, and Doris and I got to work banding birds double time!

Many of the Indigo Buntings, Field Sparrows, and Chipping Sparrows in the “compost net” were young of the year, which is great proof that they nest in or near Rushton Woods Preserve.  In addition to contributing to nationwide bird conservation efforts, one of the main reasons we set up this banding station last year was to see which birds are using this special habitat.  Baby birds are great proof of the quality of our habitat as a breeding ground.  The baby Field Sparrow was especially important because they are declining throughout their range as a result of loss of grassland habitat.  Plus, this sparrow was absolutely adorable with its tiny pink bill, its bright white eye-ring, fuzzy baby body feathers, and lopsided tail (the rectrices were all coming in at different rates).  He was a cute little mess!  Unfortunately, I don’t have a picture to show you because we were in the middle of processing the 15 birds.

Adult Field Sparrow
An adult field sparrow banded earlier this summer.

The other thing I wanted to share with you is this recent New York Times article about the sobering truth of glass buildings luring millions of birds nationwide to their death each year.  Collisions with glass buildings in cities is the second leading cause of deaths to migrating birds, after habitat loss.  I don’t like to end on such a sad note, but this is a real problem that Audubon and the American Bird Conservancy are working hard to publicize.  Raising awareness is the key, as some architects are already coming up with innovative solutions that are being readily adopted by some cities.

And for the next addition to your personal library, I would recommend “The Birder’s Handbook: A Field Guide to the Natural History of North American Birds.”  It is an essential companion to any identification field guide.  I spotted Doris’s copy on the banding table the other day and immediately snatched it up to page through it.  It is quite a treasure and a joy to read (for bird lovers).  There are species accounts with the most detailed information, like what height in the tree you should look for that particular bird, interspersed with fascinating articles on avian natural history and ecology.  I’ll be ordering my copy from Amazon very soon!

I hope to see you at the banding station next week, Tuesday and/or Thursday morning, if the rain has stopped!  The Rushton fields of goldenrod are absolutely stunning, almost as stunning as our fall warblers…

Happy Fall,

~Blake

Screech Owl
Portrait of our Eastern Screech Owl by Justin Thompson.

Filed Under: Bird Banding, Bird Events, Owls Tagged With: Bird banding, Black-throated Blue warbler, Canada warbler, compost, Connecticut Warbler, Field sparrow, New York Times, PA Young Birders, Screech Owl, woodpecker

CONTACT

925 Providence Road
Newtown Square, PA 19073
(610) 353-2562
land@wctrust.org

JOIN OUR MAILING LIST

Copyright © 2025 · WCTRUST.ORG