Tag: photo

From our most recent nest box monitoring report, with some photo annotations:

A quite pleasant morning on the wetland.

Win some, lose some: Box #84 is hatched out, and Kat and Chris found WODU ducklings in box #2. It’s possible that a Wood Duck is starting a second clutch in box #6, with 2 eggs laid there recently. So for the season, that’s 13 of the 16 boxes with nests, and 6 nests that have fledged so far.

On the downside, it appears that boxes #1 and #3 were predated by snakes: the boxes are not messy inside, just empty, and there is mud streaking in box #1’s pole that could be snake-caused. These are the 2 new boxes bear the observation tower, the ones that don’t have predator cones.
Let’s meet again on 22 May and check all the boxes. Based on what we find then, we’ll make a plan for at least one day in June, perhaps two.

We got some looks at the Barred Owl adult and owlets; newly-observed birds for the season were Acadian Flycatcher and Northern Rough-winged Swallow; migrant Pectoral Sandpiper and other shorebirds. Chris turned up a wee American Toad near the vistors’ center.

Our first field trip for Rachel Gauza’s herps class took us to Jug Bay Wetlands Sanctuary in Anne Arundel County. Our host guides were Mel Fegler and Mike Quinlan. This is a popular natural place on the Coastal Plain, and rightly so. I heard my first Wood Thrushes of the year in the parking lot.

But the focus today is amphibians and reptiles! In the morning, we worked several spots near the McCann Wetlands Center. Mike found an Eastern Wormsnake (Carphopis amoenus) under a coverboard in the meadow adjacent to the center.

Moving into the deciduous woods along the Middle and Forest Trails, we saw a nice selection of herp diversity: Eastern Box Turtle (Terrapene carolina), Wood Frog (Lithobates sylvaticus), American Toad (Anaxyrus americanus), Fowler’s Toad (A. fowleri), Marbled Salamander (Ambystoma opacum)—and one toad of doubtful status that I want to follow up with Rachel on.

We dropped down from the right of way of the railroad that once ran from Seat Pleasant to Chesapeake Beach into the floodplain of Two Run Branch to visit several seasonal (now dried) and persistent pools. Opportunities to see Marbled Salamander larvae, Eastern Cricket Frog (Acris crepitans), and a choice-sized American Bullfrog (Lithobates catesbeianus). Marbleds breed in the fall and the eggs overwinter, giving them a head start in develop come spring, so (as you can see), they’re already well along the way to becoming adults.

At lunch break, back at the center, I heard a Summer Tanager (Piranga rubra), and I think this is the first time that I’ve heard the call that Dick Walton’s tapes taught me so long ago as “piki-tucki-tuck.”

In the afternoon, Mel took us to a seasonal pool on the the Glendening Nature Preserve section of the sanctuary, the pool known locally as Barn Pool. We did some sweep netting through this pool, in a very rough approximation of the sampling protocol that Mel follows when she’s monitoring. The water levels were quite reduced, but there were many Marbled Salamander larvae to be netted.

Nest box team report for this morning:

We are up to 8 active nests, a couple of them with 1 or 2 Hooded Merganser eggs mixed in with Wood Duck eggs. I pulled together a couple of the images that Kat and Melina had provided last year for comparison of the eggs.

It looks like these boxes are complete clutches, now being incubated, so we can skip checking them next week: boxes #10, #6, #84, #13, #62. Actually, we never did get a good count for #6 (that’s the one where the male Wood Duck has been stationed on top of the box), as the hen there does not flush.

There was a bluebird box near duck boxes #2 and #4 that fell apart.

First Tree Swallows seen by the team were spotted over the wetland. There was a (migrant, supposedly) Ovenbird foraging at the edge of the parking lot at 8:30.

From the report of the nest box team this week:

We are up to 6 active nests, 2 Hooded Merganser and 4 Wood Duck (with the odd extraspecies egg in some of the boxes). The new predator guards look really good — thanks! [As you can see, attaching the guards to our poles requires a little in-the-field engineering.]

The two new boxes in the new pool near the tower don’t have predator cones yet. Are there any more available? Also, box #3, although it has 3 eggs in it, also has a wonky door that doesn’t close very tightly. It might be possible to tighten up/relocate the hardware so that the door is a snugger fit.

First work day of the season maintaining and checking nest boxes! We already have nests started in two, maybe three boxes (I suspect one of the nests is from last year, abandoned), and this is all before we fluffed up the boxes with fresh chips inside. We also have an open to-do item to install predator guards on the poles. We introduced new recruit Kathy to the dubious pleasures of squoodging through the soft mud of the wetland. And we got a little training in the new protocol for cleaning our gear, in hopes of controlling the spread of ranavirus.

Our resident beavers have rebuilt the lodge that wants to overtake the bench at the start of the boardwalk. And, at that same spot, they have built a new dam off to the left of the boardwalk.

We heard female Wood Ducks hoo-eeking numerous times; lots of Mallards hanging out, too.

Down by box #13, on the dry land before the observation tower, I found something that’s fairly common but I’d never noticed it before, probably because I wasn’t looking for it: the hunkered-down, overwintering, two-colored leaves of Cranefly Orchid (Tipularia discolor).

Gaylan Meyer led a two-hour workshop in introductory identification of mosses in Fred Crabtree Park, just south of Reston on Fox Mill Road. Fred Crabtree Park (renamed from Fox Mill Park since the last time I visited) is a pleasant patch, protecting part of the Little Difficult Run watershed. Gaylan has identified at least ten, maybe 12 moss species in the park.


We keyed out one species, using the recent McKnight et al., Common Mosses of the Northeast and Appalachians (2013). The first swell surprise about moss ID is that there’s not a lot you can do in the field with mosses. You can classify plants into growth form, acrocarp or pleurocarp, and if you’ve got tweezers and a hand lens you might be able to look at leaf shape and the presence of a midrib. Gaylan identifies this as Yellow Yarn Moss (Anomodon rostratus). For the remaining mosses we looked at on the trip, we relied on Gaylan’s scouting of this location and his patient work at home with his microscope.

Oil Spill Moss (Platygyrium repens), at left, and Feather Comb Moss (Ctenidium molluscum), at right, are pleurocarps, frequently branching and usually trailing along the substrate.


The more conspicuous mosses are acrocarps, with upright stems packed together like tufts of carpet. At left is Wavy Starburst Moss (Atrichum altecristatum) and at right is Pincushion Moss (Leucobryum glaucum). For the starbust moss, the sporangia, ending in the brown tubular capsules (empty, with lid off), are fairly well imaged.


Gaylan’s call on this plant is Polytrichum commune, but after checking the Digital Atlas of the Virginia Flora, I think that Juniper Haircap Moss (P. juniperium) is much more likely. By the way, the otherwise invaluable USDA PLANTS database is pretty hopeless for range maps for mid-Atlantic bryophytes.

We also looked at a few plants that are not mosses. Here’s a lovely patch of Shining Clubmoss (Huperzia lucidula), a/k/a Shining Firmoss. The clubmosses, firmosses, running cedars, and such are in a bit of a classification jumble. But they are nevertheless vascular plants that only happen to resemble true mosses.


And a fern-savvy member of the group ID’d this as Spinulose Woodfern (Dryopteris carthusiana). I didn’t get an image of the entire frond, but at least this time I remembered to look at the sori.

On our way back from Martinsburg, a quick loop stroll to Hog Rock in Catoctin Mountain Park. Leta is collecting bits of bark for some indeterminate future project.