Nelson County Big Day 2019

We drove slowly down the dirt road Findlay Gap Drive through clouds of fog, the shadows of pines just visible through the dark night.  Eastern whip-poor-wills sang around the road, some close, their songs loud and incessant, others further, at the edge of my hearing.  We passed a small creek, and a few frogs called above the noise of the moving water.  We stopped where a recently cut area bordered a more mature stand of pines.  A barred owl called from farther down the row of trees.  I occasionally caught the high buzzy calls of warblers flying overhead.  We continued down the road, pausing periodically to listen, or to play a screech-owl song, but we didn’t hear any more owls.

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Eastern Whip-poor-will — Photo from Ohio

By the time we arrived at Norwood Road, the night felt a little less dark.  We stopped across a farm field from a row of pines and deciduous trees bordering the James River.  Two whip-poor-wills sang from the trees, as well as a chuck-wills widow, it’s longer, more complicated song blending in with the whip-poor wills.  The chuck-wills widow was the first one I’d ever heard in Nelson County.  We drove along Norwood Road and then up James River Road towards James River State Wildlife Management Area.  We heard and even saw several more whip-poor-wills as they flew up from the road, but the only new species we added was a northern rough-winged swallow we heard flying overhead.  We got to James River State WMA just as the sky was beginning to lighten in the east.  Two whip-poor-wills sang near the entrance, a hotspot first.

Our mom left me and my brother Theo to meet our friend Drew, who would be joining us for the rest of the day.  The three of us were doing a Nelson County Big Day, trying to see as many species of birds as we could in Nelson County in 24 hours.  We’d done our first Nelson County Big Day on April 29, 2018, when we had 98 species.  Now we were doing it on May 3rd, several days farther into spring migration, and with much more knowledge about how to find birds in Nelson County.  The goal of both big days, aside from having fun birding, was to explore Nelson County and add to the eBird data, since Nelson is still not birded nearly as much as many of the adjacent counties.

Nelson County is vaguely rectangular in shape, with the southeast border formed by the James River, and the northwest border roughly following the Blue Ridge Parkway.  Nelson is very rural, with many small rivers and large patches of forest, as well as a significant amount of agricultural land and pasture.  Last year, our big day route had started at dawn along the James River, then continued across the county and up into the mountains, along the Blue Ridge Parkway, and ended in the Rockfish Valley in the northern portion of the county.  This year I planned on following a similar route, but with the exact locations and time spent at each location optimized from my experience to get us the most birds.  For example, last year our nocturnal birding had consisted only of a visit to Sturt park, where we got whip-poor-wills and nothing else.  This year, I’d carefully planned our route to give us as good a chance as possible at other nocturnal birds, especially chuck-wills-widow.

At James River State WMA, Theo and I walked down the main road listening to the dawn chorus of birds.  Blue-gray gnatcatchers, indigo buntings, common yellowthroats, white-eyed vireos, and yellow-breasted chats sang all around us.  At the James River, we heard a prothonotary and yellow-throated warbler singing from tall silver maples that lined the river.

The fog was still dense and low as we walked into the marsh impoundments, making it hard to see more than 15 feet in front of us.  The path was not mowed, so despite the earliness of the season it was already overgrown by waist high grasses and mustards.  The dense fog had coated the weeds with water, so as we brushed up against them the water rolled off, drenching my shorts and filling my boots with water.  One would have hoped the wetness would suppress the ticks a little, but sadly this was not the case.  By the time we reached the end of the marsh, I had pulled several off me.

Every time I visit the James River State WMA marsh in the spring I dream of finding bitterns or rails, or some other epic marsh bird that isn’t yet recorded from Nelson County on eBird.  The marsh isn’t super high quality because the water level fluctuates constantly and there are many invasive plants, but it is the best one I know about in Nelson, so I will keep hoping.

We heard wing flapping, and then the cries of wood ducks as they flushed off the marsh in front of us.  The marsh was high with little exposed mud, so we were unsurprised, although a little disappointed, not to find any shorebirds (or bitterns or rails sadly).  We heard a northern waterthrush chip, and then saw the bird briefly fly over us and land in a dense clump of vegetation.  Orchard orioles sang from the willows all around us.  At the end of the marsh, a wood duck family swam away from us, the chicks still downy and unable to fly.

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Northern Waterthrush — Photo from Augusta County

From the end of the marsh impoundments we continued back into the WMA, along a grassy road bordered on both sides by dense box elder thickets.  We emerged onto the train tracks and began to follow them back towards the main road.  Yellow warblers sang from the swamp around us, as did the omnipresent common yellowthroats and indigo buntings.  Drew called, and said he had a bobolink at the intersection of the train tracks and road.  We picked up our pace, and soon joined him in trying to re-find the bobolink.  We walked off the road into a wet field, picking our way carefully through blackberries and rushes.  A swamp Sparrow foraged in the bottom of a wet ditch.  Suddenly, a black bird with gold and white highlights flew past us.  “Bobolink!”  I shouted, as the bird landed in the top of a tree in front of us and began to sing.  It was the second Nelson County lifer of the day for me, as well as a hotspot first for James River State WMA.

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Bobolink

The three of us continued up the road, adding pine warbler, prairie warbler, Baltimore oriole, and ruby-throated hummingbird.  We walked along a power line right-of-way into a field overgrown with shrubs, where we found blue grosbeaks, and had a green heron and a red-headed woodpecker flyover.  A bright yellow warbler also flew overhead.  At first we thought it might be a blue-winged, but review of our photos showed it to be a Cape May, not as rare but still new for the day.

The next stop was Wingina Boat Ramp, where James River Road crosses the James River. About 50 cliff swallows were nesting under the bridge, flying out over the river and the adjacent corn fields in swirling masses.  We also heard a black-and-white warbler and a yellow-throated vireo singing from the tall trees along the river.

We drove back along Norwood Road, now in full daylight, looking and listening for birds.  We saw a mallard on a small pond by the side of the road, and a common grackle building a nest.  On Variety Mills Road, we stopped to check a long, muddy puddle in a cow pasture that I’d seen on previous trips.  To our delight, there was a lesser yellowlegs foraging in the mud with three solitary sandpipers.  Since the puddle was only a couple of feet from the side of the road, we were able to approach for photos.

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Lesser Yellowlegs

We followed Variety Mills Road through wooded ravines and along a small, swift flowing river.  We heard ovenbirds, worm-eating warblers, black-and-white warblers, American redstarts, northern parulas, and a blackpoll warbler.  When the road emerged out of the woods back into a large stretch of pasture, we heard grasshopper sparrows singing.  By the time we reached the intersection of Variety Mills Road and Route 29 at Colleen, our list for the road was 47 species.  I hadn’t known before that Variety Mills Road could be such a good birding spot, and I wondered what it would be like in fall migration.

From Colleen we followed Route 56 northwest into the mountains.  At first the landscape was similar to that along Variety Mills Road, with extensive pastures and the Tye river running close to the road.  The fresh, sweet scent of sweet vernal grass in the fields perfumed the air.  We were watching the river carefully, as in 2018 we’d had a pair of common mergansers on it.  Drew caught something on the river out of the corner of his eye, but it was just two Canada geese.  We were about to continue when we saw the brilliant white plumage of a male common merganser just a couple feet below the geese.  A closer look revealed a female as well, swimming near the male.  As we got higher into the mountains, the landscape became more forested, and we could soon hear American redstarts and Ovenbirds almost constantly out the windows.

At the Montebello State Fish Hatchery we walked along the road, hearing chestnut-sided and blackburnian warblers along with many redstarts.  We located a female blackburnian, and watched it forage low in the shrubs for several minutes.  Although not as bright as a male blackburnian’s throat, the dull, rusty orange of this bird’s throat was still impressive.  Other high elevation breeding birds like blue-headed vireos sang.  An osprey flew overhead.

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Chestnut-sided warbler

We got on the Blue Ridge Parkway and drove northeast towards Afton.  We stopped at all the overlooks and pullouts on the Nelson County side of the road, and slowly but steadily added a few more species.  Bald eagle, cerulean warbler, and common raven were all new for the day.  Other warblers sang around us almost the whole drive, including ovenbird, American redstart, and hooded, black-and-white, and chestnut-sided warblers.  At Wintergreen we added dark-eyed junco, only a few weeks ago common all over the county, but now requiring a search at their breeding grounds high in the mountains.

As we drove into the Rockfish Valley, we totaled our species list so far.  We were at 99 species, already one ahead of last year, and it was only about 1:00 pm.  Unfortunately, the morning’s rush of birds was over, and it took a few hours and a lot of effort before we added anything new.  Our one-hundredth bird was a red-tailed hawk at Rockfish Valley Trail.  101 was a black-throated blue warbler, at the same location.  We also got great looks and photographs of this yawning tree swallow.

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Tree Swallow

We arrived at The Quarry Gardens at Schuyler at 5:30, just as the bird activity was beginning to pick up again.  We walked around the gravel trails slowly, carefully scanning through large flocks of yellow-rumped warblers.  Near one such flock of yellow-rumps I found a pine siskin, a day bird.  In another flock we had a ruby-crowned kinglet.  The final new bird at Quarry Gardens was a yellow-billed cuckoo.

The last new bird of the day was wild turkey — species number 105 — at Taylor Creek Road.  We tried for common nighthawk at Rockfish Valley Elementary School, a place I’d had them before in fall, without luck.  We returned home around 8:30, exhausted after nearly 16 hours of birding, but happy with our day.  We missed a few birds that should have been really easy, including red-shouldered hawk and northern flicker, so there’s definitely still room to do better, perhaps much better, next year.

Spring Butterflies at Quarry Gardens

The hairstreaks and elfins in the genus Callophrys are some of my favorite butterflies.  They are tiny, usually not much bigger than a dime.  Their wings range in color from brilliant green to iridescent brown, blue and even pinkish.  Elfins especially fly only early in the season, so I was anxious to try to see and photograph some before they disappeared for the year.  A late April trip to Quarry Gardens at Schuyler provided the perfect opportunity.  Extensive stands of short-leaf and Virginia pine with eastern juniper in the understory — the host plants of pine elfin and juniper hairstreak — grow there.  Brown elfins have also been recorded, although their host plants, blueberries, are less numerous.

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Golden Ragwort at Quarry Gardens

Quarry Gardens is a botanical garden designed to showcase the flora and fauna native to Schuyler, VA and the surrounding area.  The Center for Urban Habitats inventoried the plants and animals naturally occurring there, and used that information to design and plant gardens representative of particular native plant communities.  It lies partly on top of a formation of soapstone rock, and several abandoned, water-filled, soapstone quarries are on the property.  It is home to fragments of a state rare plant community — ultramafic woodland — which only grows on magnesium rich (ultramafic) rocks like soapstone.  Many locally and regionally uncommon species have been documented there.  For more information about Quarry Gardens’ unique history, geology, plants and animals, see my older post: Quarry Gardens: Ecosystem Modeling Under Geological Constraints.

Bernice Thieblot and Devin Floyd — the owner of Quarry Gardens and the director of the Center for Urban Habitats, respectively — met my brother, Theo, and me at the gates.  My friend Drew and a photographer named Emily soon arrived.  We walked down to the visitor center, where a large patch of golden ragwort was in full bloom.  We hoped to find elfins nectaring on the ragwort, as Devin had seen them there last year.  Juvenal’s dusky-wings and native bees buzzed around.  It wasn’t long before we spotted what would be the first of many juniper hairstreaks, drinking from a ragwort flower.  We all pressed forward, hoping to get a picture of this stunningly green little butterfly.

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Juniper Hairstreak (Callophrys gryneus) on golden ragwort (Packera aurea)

We decided to meander down the path that led around the old quarry pits.  It was cool and shady under a thick canopy of pines.  Lichens carpeted the ground in places.  The mulch covered trail led down rock steps into an area planted with rich forest spring ephemerals.  Mayapples, Solomon’s seals, wild geraniums, dwarf larkspur and wild ginger bloomed near the path.

We emerged from the trees into a small meadow, sloping down towards the edge of the water in the quarry pit to our right.  The white flowers of pussytoes and wild strawberries were just beginning to open.  Suddenly, Theo called out that he saw an elfin.  Drew and I rushed over, and we watched it land on a barely opened pussytoes flower.  One of its hindwings was damaged, but it was able to fly well enough to make getting a good photo difficult.  Eventually it settled down, and we watched as the brown elfin tilted its wings into the sun.  For a moment, the color seemed to change from plain brown to a rich assortment of pinkish and orangey hues.

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Brown Elfin (Callophrys augustinus) on pussytoes (Antennaria sp.)

We left the brown elfin and continued down the trail.  We looked for mountain bellwort, one of the rare plants growing at Quarry Gardens.  We were excited to discover all 10 of the plants growing there in full bloom.

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Mountain Bellwort (Uvularia puberula)

Drew, Theo and I walked to a swale planting, filled with golden ragwort, swamp rose, marsh marigold, skunk cabbage and various sedges.  Emily, who had been wandering around separately from us, showed us a picture of a pine elfin she had just seen.  Pine elfins look like brown elfins, but their wings are covered with intricate pink and brown mottling.  They are also less common and more difficult to see than brown elfins.  We fanned out, scanning the ground and the sky trying to re-find it.  I decided to walk down by the edge of the quarry pits, where I found my first of year Selys’ sundragon, but no pine elfin.

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Selys’ Sundragon (Helocordulia selysii)

Just as I was getting back toward the seep, I heard Theo yelling his head off about a pine elfin.  I ran toward him, and arrived just as he lost the butterfly into the trees.  We set about walking around once again, desperately trying to re-find it.  I caught movement out of the corner of my eye.  Turning, I saw a nickel sized butterfly bouncing away from me.  We chased after it, and soon the pine elfin landed.  The sunlight sparkled off of its metallic wings in a way that photos never seem to do justice to.  The white bands and mottling flashed in the light.  Then, before I could even reach for my camera, it was gone.

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Pine Elfin (Callophrys niphon), Photo by Emily Luebke.

As I was walking back, still hoping for another pine elfin to photograph, I looked at a small brownish butterfly sitting on an American holly leaf.  I assumed it would be another juniper hairstreak — they were one of the most common butterflies out — or a brown elfin.  To my surprise, I saw a white band on the hindwing, meaning it was not a brown but a Henry’s elfin — a first Quarry Gardens record!

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Brown Elfin (Callophrys henrici) on American Holly (Ilex opaca)

In retrospect, I probably should have realized it might have been a Henry’s sooner, as it was sitting on a holly leaf, which is a host plant for Henry’s elfin.  With three species of elfins in one day, I was ready to forego my dreams of perfect pine elfin photos.  Maybe next year…

Quarry Gardens: Ecosystem Modeling Under Geological Constraints

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The Quarry Gardens property was used as a soapstone quarry between the 1950s and 1970s.  After the soapstone industry abandoned it, the community used it as a dump until Armand and Bernice Thieblot bought it in 1991.  In 2014 the Thieblots embarked on a mission to create a publicly accessible native plant botanical garden, showcasing the unique local native plant communities of the quarry’s soapstone geology.  The Thieblots hired The Center for Urban Habitats (CUH) to plan and plant the gardens.

CUH has a very unique approach to landscaping, ecosystem modeling, which involves replicating naturally occurring plant communities in garden settings.  When CUH approaches an ecosystem modeling project, they observe factors such as geology, topography, elevation, drainage, existing plants, and lighting to help them infer from experience gained during prior surveys elsewhere what plant community is best suited to each exact location.  Their specialty is figuring out the “ecosystem trajectory” of an area based on these existing site conditions.   CUH studied the Quarry Garden project area for six months prior to planting, conducting an extensive biological survey to identify and map the distribution of existing plant communities.

Today, the 40 acre Quarry Gardens consists of nine main sections, each with numerous native plant gardens.  Two huge, semi-rectangular water-filled pits, the remnants of the old quarries, dominate the center.  If you look closely at the tall, vertical soapstone walls of these quarry pits, you can see the grooves in the soapstone left by the quarrying process.  Piles of giant discarded soapstone chunks are distributed around the property.  From the parking lot, the land slopes gently down towards the quarry pits. It continues to slope down on the other side of them, all the way to a small, meandering creek, which flows through a sunny, wet clearing just off the property.  Two gravel roads lead around the quarry pits from the parking lot, one traveling the parameter of the property, and the other forming an inner loop around the quarry pits.  From these roads, one can see most of the beautiful plant communities that have been planted here, from the bright flowers of the viewing platform prairie to the dull greens of the piedmont hardpan forest.  The planted gardens blend perfectly with the surrounding natural plant communities.

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Native landscape installation at the Viewing Platform, including niches for barrens, 
hardpan swales, and prairie.

CUH learned about the geology of Quarry Gardens mainly from observing sections of exposed rock and the existing plants.  They saw piles of soapstone boulders left over from the quarrying process, and the huge portions of rock that were revealed in the walls of the quarry pits.  They also studied the present plant communities to infer the type and location of the underlying geology.  They found that the plant communities could be divided into two main groups based on their tolerance of either ultramafic, a high mineral soil type with more magnesium than calcium, or acidic soil conditions.  Ultramafic soil is so high in magnesium that it is toxic to many plants.  CUH knew that soapstone bedrock, which includes many different types of ultramafic rocks and minerals, had to underlie plants that could tolerate ultramafic conditions.  Similarly, CUH inferred that the Charlottesville Formation, which consists of mineral poor sedimentary rocks, must underlie the observed plants in the “heath” community, which occur in acidic, nutrient poor soils.  Later in their process, CUH conducted soil tests, which provided more details about the geology.

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View from the prairie below the viewing platform. Monarda, Solidago,
Eupatorium, and Pycnanthemum command this view.

The soapstone bedrock that underlies most of Quarry Gardens supports some very rare plant communities, including ultramafic woodland.  Fragments of this nearly vanished plant community, dominated by old post and blackjack oaks over an understory of little bluestem, remain around the parking lot of Quarry Gardens.  The most abundant tree in the ultramafic woodland at Quarry is Virginia pine, a species that under natural fire regimes would have been less prominent.   Ultramafic woodland is so rare in Virginia because it can only be found on ultramafic rocks, like soapstone, and it requires periodic disturbance in the form of fire to keep less fire-adapted plants like the Virginia pine from encroaching.  Since soapstone is such a rare and commercially desirable rock, quarries have almost completely destroyed ultramafic woodland in Virginia.

Two other plant communities that grow over the soapstone bedrock at Quarry are piedmont prairie and hardpan swale.  Gardens showcasing these communities are prominently located in front of and behind a viewing platform that overlooks the large quarry pits.  Under the thin soils of the prairie and hardpan swale lie huge soapstone boulders, remnants of a filled in quarry.  The gaps between the boulders are filled with smaller bits of soapstone, such as pebbles and soapstone silt.  Due to this, the drainage in the viewing platform area varies extremely widely.  The piedmont prairie drains immediately and is hot and dry for most of the year, while the hardpan swale is virtually always wet.

The extreme drainage conditions and high magnesium levels of the prairie combine to make this area only inhabitable by the toughest species growing in piedmont prairies.  CUH chose species that could survive the extremely dry and high magnesium present by selecting piedmont prairie species that have been found growing on serpentine barrens and ultramafic barrens, which share these harsh conditions in an even more dramatic fashion.  Forbs chosen for their toughness and tolerance of magnesium include hoary mountain-mint, gray-goldenrod, tall thoroughwort, white colicroot, and glade wild quinine.  Important grasses included poverty dropseed and little bluestem.

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Center for Urban Habitats staff, Soizic and Rachel, inspect the prairie installation 
during its first season. Non-native grass seedlings and forbs are plucked out and replaced by 
dominant ultramafic prairie species like little bluestem.

Looking at the viewing platform prairie, one would never know how challenging a growing environment it is.  Most of the plants have flourished here, creating a colorful testament to the resiliency of native ecosystems.  Bold clumps of hyssop-leaved thoroughwort with feathery white plumes buzzing and humming with insects towered over smaller species.  Gray goldenrod, showy goldenrod, sweet-scented goldenrod, and wrinkle-leaved goldenrod all bloomed profusely.  Over to one side, near a quarry pit, the triangular leaves and strangely shaped flowers of spotted bee-balm accented the area.

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Silvery checkerspot butterflies, along with 40 other species of butterfly have been noted at Quarry Gardens.  Many of them enjoy the mountain-mints there, including narrow-leaved, hoary, and short-toothed mountain-mint.

Plants were selected for the hardpan swale that tolerate poor drainage, and that had been documented locally in magnesium rich hardpan swales.  Winterberry, golden ragwort, and blue mistflower were prominent.  The blue mistflower was especially noticeable in September, as it created brilliant cushions of blue flowers that seemed to float above the wetland sedges.  Lush longhair and sallow sedge blanketed the ground.

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Blue Mist flower is a guaranteed success in the harsh conditions presented by storm water 
management swales. It does well in the magnesium saturated hardpan swales at Quarry Gardens.