Category: In the Field

Through Virginia horse and wine country (every time I come through there’s a new winery offering tastings) to the big Park straddling the Blue Ridge, with a pause for this wonderful combination of wayfinder signs using “Freeway Gothic” and Clearview together.

I devised a bowtie circuit starting from the Hawksbill Gap parking area: up the steadily steep trail to the Hawksbill Mountain summit, down the Salamander Trail to the Appalachian Trail, the AT north to the stables at Skyand, returning via the bridle path, Limberlost Trail, and Crescent Rocks Trail, with a quick side trip to my special place on the Ridge, Betty’s Rock. I’m estimating the mileage at 8.0; I went around in 4:20, and made the 680-foot climb of the mountain in about 25 minutes. Yay me.

Except for the climb, the trails are fairly level, and the AT is not too rocky, at least mostly. Fall colors are still developing: I saw yellows and golds stirred into the pale green, with the occasional maple or sumac or poison ivy to provide a shot of red. Ravens and juncos constituted most of the bird life. One mixed flock of songbirds with a mystery warbler—perhaps a parula. A nuthatch calling very fast, in a ank-ank/ank-ank/ank-ank rhythm. Ground squirrels were very conspicuous, though they tried not to be.

On the northwest side of the ridge, thriving in the poor soils of the talus fields, I found several stands of Mountain-ash, probably American (Sorbus americana), though the fruits are definitely red, not orange (per Petrides).

Some tidbits from the most recent newsletter from Friends of Huntley Meadows Park:

• The crayfish population is up! Resource Management Intern Alice Millikin writes that water quality monitors as well as turtle and frog trappers reported increases. The nets used for water quality monitoring caught 28 individuals, more than the catch for the past five years combined.
• King Rails (Rallus elegans) are back! Park Manager Kevin Munroe says in his message that a parent with four or five chicks was seen at least three times in the period 19 July to 27 July. Higher water levels, a habitat mosaic created by muskrats and beavers, and increased crayfish numbers are responsible.
• Construction for the wetland restoration project has been delayed again. A dam breach analysis was recently completed, with the anticipation that the project can be qualified as low-hazard, and hence move through the permitting process. A 2010 date for construction is still possible, but 2011 is more likely.
• Also in 2010-11, the surface and toe boards of the boardwalk will be replaced, this time with recycled plastic materials. Lower maintenance, and a greener message. The project is funded by the 2008 bond referendum.

Today’s hike was a leisurely 8 miles (though we had expected 6) up the Seneca Creek Greenway Trail, organized by ANS and led by Bob Pickett. We began where Seneca Creek crosses Brink Road and worked our way upstream, then climbed out of that watershed to follow the Magruder Branch up to its crossing of Valley Park Drive, just south of Damascus in upper Montgomery County, Maryland.

The hiking is easy, with just a little elevation change. There is one slippery crossing of Magruder Branch which we all managed to varying degrees of dryness. The upper reaches of the trail we followed, above Log House Road, lie within Damascus Recreational Park, and consist of accessible asphalt and boardwalk.

Bob’s strength is the green stuff, so we botanized great and small, including this huge White Oak (Quercus alba). We found some individuals of another as-yet-unidentified oak species, something resembling Shingle Oak (Q. imbricaria); one of its saplings is visible in the image, between Bob and the big tree. Among the wildflowers blooming in late June, Bob pointed out a yarrow, Water Hemlock, Fringed Loosestrife, Deptford Pink (I gotta learn how to do macro with my point and shoot). The wet bottomlands yield half a dozen species of ferns. I learned that the green case of an immature Mockernut Hickory (Carya tomentosa), when scratched, smells wonderful.

Our destination species, if you will , was found in several patches north of Log House Road. Wavyleaf Basketgrass (Oplismenus hirtellus ssp. undulatifolius) is a new invasive of particular concern in Maryland. Perennial, shade indifferent, and propagated by seeds that can attach themselves to passing mammals, the plant has a lot of weapons at its disposal. The patch in this image was recently treated with a herbicide, but we found another untreated patch nearby.

A colloquy of nuthatches met to discuss our lunch break. Acadian Flycatchers and Wood Thrushes were numerous, if not easy to spot.

Last weekend, I did a spot check of the last two nest boxes, and was gratified that both were successful. Box #2 (at left) hatched out eight Hooded Merganser eggs, and box #68 (at right) hatched eight Wood Duck eggs, with one unhatched. For the season, our totals are down a little bit from last year, which had seen a big spike in Wood Duck activity. In 2009, we had four Hooded Merganser nests, three of which hatched out: 39 eggs laid, 29 hatched. We had five Wood Duck nests, all of which hatched out: 61 eggs laid, 59 hatched. Park staffer Dave Lawlor reports one successful nest in the boxes he is monitoring, with nine baby mergs.

The park is a green blast of primary production. Bird activity is subsiding, with only one lazy egret to accent the landscape. I saw a family of Mallards; a Red-shouldered Hawk was screaming an important message to someone. Chris IDs the large-leaved plants in the right image as Spatterdock (Nuphar lutea).

Set off by the green is the bright orange of a drift of Dodder (Cuscuta spp.), a parasitic vine that I find absolutely fascinating.

For the holiday, I took a run up I-95 to Soldiers Delight Natural Environment Area, northwest of Baltimore, for a nature stroll.

Stepping on to the trail at the visitors center, in a trice I lost the trail and wandered on to an interpretive trail still under development. The downed trees across the trail and the ticks that tried to hitch a ride on my legs should have been a clue. I had to double back and walk back on the verge of Deer Park Road, and I was caught in a passing rain shower, for my sins.

I had better luck following the trails on the east side of Deer Park Road. Nevertheless, had I brought my hiking boots instead of my birding shoes, I would have been glad of the added support. Birdlife included lots of Field Sparrows and Eastern Towhees and a plus-sized Blue-gray Gnatcatcher; best sighting for the trip was a small group of Cedar Waxings (Bombycilla cedrorum). Heard a possible chat and Pine Warbler.

Soldiers Delight is underlaid by serpentine rock, which yields thin soils short on nutrients and long on toxic metals like chromium, so the plant communities are distinctive, as well as the animals that depend on them. Most of the wildflowers will have to wait until my ID skills improve, but here I’m pretty sure that we are looking at Serpentine Chickweed, a subspecies of Cerastium arvense, found in one of the grassland areas.

In the woods, I found a Little Wood-Satyr (Megisto cymela), described as abundant in my field guides but nevertheless new for me.

I had intended to show Dirk the nest box with Tufted Titmouse eggs in it, but we were surprised to find that the eggs had already hatched and the nest comprised six gaping, blind mouths.

As for the intended residents, Box #13 hatched out 13 Wood Duck eggs. A merganser family of hen and three ducklings, practicing diving, was spotted this morning; possibly this is the same family of thirteen that hatched on 17 April.

Four boxes in a row along lower Barnyard Run are due to hatch out soon, probably this week. We then have two remaining boxes to hatch in June: #2 at the head of the main pond (Hooded Merganser) and #68 at the far end (Wood Duck).

New bird arrivals detected over the past couple weeks: Chimney Swift, all three swallows, Wood Thrush, Yellow-billed Cuckoo, Acadian Flycatcher, and a Brown-headed Cowbird chasing insects in the parking lot as bold as any urban Rock Dove.

The subject of my term paper for the Introduction to Ecology class that I recently completed is Huntley Meadows Park. The paper is a little long on data and short on analysis, but I’m happy with it. From the introduction:

Huntley Meadows Park comprises approximately 1,425 acres (577ha) of freshwater wetland and surrounding forest in southern Fairfax County, Virginia. Managed by the Fairfax County Park Authority (FCPA), it is the County’s largest park, and features the largest (70+ acres, 28+ ha) non-tidal marsh in the area. Bounded by housing subdivisions to the north, east, and south, and government installations to the west and southwest, the Park is an island of blue and green prized by casual strollers and scientific specialists alike. It is particularly valued by naturalists for the unique diversityof the habitat to be found there, especially considering its urban/suburban surroundings. Guidebook writers and editors like Scott Weidensaul [Weidensaul92] and David W. Johnston [Johnston97] have singled out the Park for special attention, noting that its mix of woods and water makes it a popular spot for Big Day birders; Weidensaul calls the Park’s very existence “utterly improbable,” encroached on as it is by the busy traffic corridors of U.S. 1 and Interstates 95 and 495. The main entrance to Huntley Meadows Park is only three miles from the Huntington terminus of Metro’s Yellow Line, and hence the Park is a short trip from anywhere in the Washington, D.C. metropolitan area.

Maples are leafing out, offering some shade in the unseasonal midsummer heat. Frogs are everywhere, including a pair of Green Treefrogs (Hyla cinerea) resting inside our one plastic nest box. At least something is getting some value from it. New arrivals seen/heard/reported: Yellowlegs sp., Solitary Sandpiper, Great Crested Flycatcher, White-eyed Vireo, Red-eyed Vireo, Yellow Warbler, Prothonotary Warbler (a singing male and a no-bins look at a foraging female), Ovenbird. A Tufted Titmouse is squatting in box #5 again.

New cattail growth is ankle-high, and the understory in the forest is starting to green up. We had our first box hatch out on Friday (according to reports from a photographer), and the hen and thirteen ducklings put on a show skittering about the main pond this morning. Unfortunately, we’ve also had our first nest failure, as box #3 has been predated and the remaining two eggs abandoned. Common Yellowthroats and American Coots made their first appearance this week; Blue-Gray Gnatcatchers were numerous. Myra found a Meadow Vole (Microtus pennsylvanicus) feeding by the boardwalk.

In past weeks, at least one Virginia Rail (Rallus limicola) has been audible and fleetingly visible, and a passing-through Sora (Pozana carolina) was reported the week of March 29. Jennifer spotted a Beaver on that trip, too. Common Snipe and Great Egrets have also arrived.

Amy Gardner gives a brief update on plans for the water control structure at Huntley Meadows Park, and visits with Harry Glasgow of the Friends group. She misrepresents a bit when she writes “King rail, hooded merganser and pied-billed grebes no longer breed…” The Hooded Mergansers are doing just fine.

When I was a kid, attending Saturday morning training to be confirmed in the faith as a Lutheran, we would take a break at mid-morning. The second year of this training was led by the pastor of this brassbound Missouri Synod congregation (someone else took the first year), and it was held on the site of the new church that was being built, farther out in the suburbs. (The new church building, which dwarfed the old building on Peach Orchard Avenue in Oakwood, was Orwellistically known as “the chapel.”) So pastor’s idea of taking a break was for us kids to scour the fields around the building site looking for small stones that would get in the way of groundskeeping. This was known, without euphemism, as “picking rock.”

I never finished confirmation, but how much this exercise had to do with my decision is hard to say.

Anyway, now I am an adult, and what do I do with my Sunday mornings, “for fun”? Pick trash out of the stream floodplain, and maybe look at some birds along the way.

We had a full team this morning, so I sent Myra and Jennifer on up to boxes #6 and #84 while I scrubbed the western bank of Barnyard Run as it opens up into the wetland. I pulled a small shopping bag of stuff out, mostly bottles and cans and broken bits of styrofoam, but also a very weary basketball. A lot of this is litter by thoughtless people, but much of it also is just escaped rubbish—an animal tears open a trash bag, for instance—from the housing subdivisions along South Kings Highway that finds its way downstream.

Not much new happening in the boxes yet: just #7, which is now incubating. Myra found a couple of Brown Thrashers and the first Tree Swallows of the season.

We took the first of two field trips that are part of Gary Evans’ Introduction to Ecology at the Graduate School, USDA. We visited two sites in Prince William Forest Park, the first a farmed-out agricultural area that is undergoing old field succession on its way to becoming deciduous forest, and the second an area that was apparently never farmed intensively.

The site of the old Taylor Farm homestead is mowed regularly, so the veg is largely panic grass and broom sedge, but nothing seems to be a match for this humungous eastern redcedar (Juniperus virginiana).

We spent a lot of time with the soil profiles of the two sites. This soil pit is from our second study site, in the drainage of the South Fork of Quantico Creek. Laid out in the spade, left to right, you can see the samples from the O horizon (organic material), the mineral-leached A horizon (cocoa brown), and the iron-enriched B horizon (ruddy orange). A Munsell color chart is visible in the right of the picture. The green sprigs of princess pine (Lycopodium clavatum) bespeak a sandier soil than at the farm site. Mountain laurel also appears here.

I also appreciate that Dr. Evans discusses some of the economic aspects of the study of nature, for instance, pointing out that the tighter growth rings for oaks and chestnuts are what make these hardwoods valuable to furniture makers and handcraftsmen. He also noted that much of the public lands acquired in the Roosevelt New Deal era were the result of forced relocation of starving farmers who had nothing left but their patches of knackered land.

Just in case anyone is listening, the marker post for the Fairfax Cross County Trail on the south side of Silverbook Road at White Spruce Way is down. It’s especially hard for someone coming from the north side of Silverbook to pick up the trail, which continues unpaved and otherwise unmarked along the south side of the road. This trouble spot is about 100 yards from the place where the trail is informally rerouted around a closure of the trail for about 10 yards, right at the corner of the old prison facility.

Immediately behind me, as I made this image, is a rather birdy spot, considering the time and season. It’s waste ground in a little hollow, filled with tangled veg (and at least some rubbish). Flycatchers like the vantage point of the top of the old fence, at least where there is a rail for perching.

Only a light frosting of snow this morning on the still-sleeping woods (the bigger dump is expected this evening). We welcomed three new volunteers to the nest box program, and those of us working the main pond got instant satisfaction, as old reliable box #7 already showed a clutch of six Hooded Merganser eggs. Green-winged Teal and Northern Pintail are lingering in the wetland. Paul reported a big flock of White-throated Sparrows.