Strange Birdfellows

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Alison had spent something like sixteen hours getting home from Canada the day before, but she was as chipper as could be expected when 4:00 came Sunday morning. The three of us piled into the car and headed south, meeting up with Frank pre-dawn for our first Barnegat Light Christmas Count.

Gellert couldn’t have been happier when he heard our assignment: to walk the beach south and the duneside back. Oh boy, Papa, a long stroll and saltwater, too!

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I know few places where the sky and the sea are as consistently beautiful as New Jersey’s barrier islands. It was warm, the sand was well packed, and there were plenty of birds to be seen; the featherless bipeds had nearly as much fun as the dog. A nice flock of northern gannets fed its way south early in the morning, and that other black and white specialty of the outer beaches, snow buntings, flicked and flittered above our heads and in the wrack. I’d warned Alison not to expect any shorebirds — our “territory” was south of the rock jetties where they all hang out — but I had to eat my words when we found some 300 dunlin working the beach; with them were black-bellied plovers, sanderlings, ruddy turnstones, and a small handful of purple sandpipers, that last a bird I don’t often run into on the open sand.

The morning’s big surprise came an hour and a quarter into our walk. As we admired the long-tailed ducks’ speedy flight and laughed at their bumbling landings, I did a double-take when a tiny black and white football buzzed down the surf: a dovekie! Neither of us had ever seen one from shore, or even in sight of shore, in New Jersey, and I told Alison, more than half serious, that I wasn’t looking forward to reporting something so unusual at the midday tally.

But we announced it anyway. The responses were not what we’d expected: “We had one, too.” “Us, too.” “We saw two.” Some inscrutable alchemy of wind and wave had driven dovekies onshore, to everyone’s surprise and delight. And best of all, it wasn’t a “wreck” by any means; all the birds seen were happy and alive, whirring up and down the beaches and no doubt exchanging expressions of their own startlement: “Why, I don’t think I’ve ever seen a human before!”

That little alcid was far and away the highlight of my CBC season this year. But it got better.

After the noontime conviviality, Alison and I did a bit of poaching, walking out Barnegat Inlet for a closer look at the common eiders and harlequin ducks riding what was by then a considerable swell. Just as we turned around, as nearly sated on sea ducks as one can be, another little black and white bird flew close overhead. This one was a swallow, a fine tree swallow, and in company with four more. Even as far north as Ocean County, that hardy frugivore is not entirely a surprise in late December, but the tree swallows’ presence was still exciting — and it created a combination I had never witnessed:

Tree swallows and a dovekie on the same day from the same beach. Not a bad way to end the birding year.

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Canadian Canadas

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White on orange? Must be another of those Québecois geese.

And so it is:

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By the way, for those interested in such things, that median throat stripe (I’m hearing it called a gular stripe recently) is very nearly complete, isn’t it?

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The Lister’s Punctilio

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I don’t like grocery shopping. At all. But Alison is even busier than usual this time of year, so it has been my lot of late to be dodging cars in parking lots and carts in narrow aisles. No fun at all.

This morning’s expedition was better, though. As I stepped out of the car, senses alert, a big black bird flew across low: a common raven. No longer rare, no longer unexpected, this species is always great to see, especially in the urban wilds of northern New Jersey.

But here’s my dilemma.

Brookdale Park is just two blocks from our local Shoprite (grocery store names!), and the tops of its tall old oaks and tulips dominate the view to the west. Which is where this morning’s raven came from.

Brookdale happens to be the only site for which I am keeping careful lists nowadays. And I’ve been expecting a common raven to show up.

But I can’t “count” this one for the park. Neither the bird nor I was in or over Brookdale at the time of the sighting, so the gap in the list remains.

Silly, yes. Arbitrary, yes. But it wouldn’t be a game if it didn’t have rules.

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An Odd Sparrow

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A cool day in late November — especially a cool day in late November with cold and big snows predicted for the next day — is perfect for spending a little time with the backyard sparrows. The roster Tuesday morning was pretty much what was expected in northern New Jersey: lots of slate-colored juncos and white-throated sparrows, with the odd chipping, song, and fox sparrow to liven things up.

One bird, this bird, stood out in the feeder flock.

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It was more than superficially junco-like, with a dull gray hood, white belly, and pink bill, but the pattern and color of the underparts were off. The dull olive-tan of the breast sides and flanks seemed wrong for not just for a slate-colored but for any junco, and the color reached quite far in towards the vent in a wide band, almost isolating the white undertail coverts. At some angles, the bird seemed to show a “color corner” between the hood and the breast sides, but at others just the usual smudgy blend shown by brown, immature or female, slate-colored juncos. Some of the rear flank feathers seemed to have very fine, just barely visible dark shaft streaks.

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A closer look revealed a couple of other oddities. The ground color of the back seemed unexceptional, but its neat pattern of prominent but fine black streaks was worth a second look.

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A bit of faint, diffuse streaking isn’t all that unusual in brown juncos this time of year, but these markings — darker in life than in the photos I took through my dirty window — struck me as beyond the pale.

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I have no good, tightly-focused images of the wing pattern, but the one above at least gives a hint of the inconspicuous dotted wing bars; the tips of the median coverts weren’t always even this visible, but several of the greaters on each wing showed very small white triangular tips, creating a short, jagged “droplet” wing bar on the gray wing.

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The bird’s tertials seemed more or less normal, with the typical broad buffy edgings of brown slate-colored juncos, if perhaps just a little more white towards the tip of the outer web than most.

While the other juncos were setting off their feathered flash bulbs all around the yard, this bird kept its tail resolutely folded. Though I could never contort myself into a position from which I could see the underside of the tail, I eventually had several reasonable if brief looks at the bird in flight, when it showed no white in the outer rectrices. Given my split-second view of the bird as it dashed into the arborvitae, I’d be hard pressed to prove that it actually even had all of its rectrices, but the ones I could see were dark.

With the growing suspicion that this might be a bird of mixed ancestry (put that way, which bird is not?), I worked hard to imagine the shadow of a face or throat pattern. The hood seemed unremarkably gray, with some dull rusty shading and streaking at some angles. There was an occasionally noticeable paler patch on each side of the neck beneath the auriculars, a feature shown by many brown slate-colored juncos.

The strangest thing about the bird’s head plumage was the area around the eye. The lore was decidedly blacker than the rest of the already dark head, no big deal in a slate-colored junco, but that color continued back to surround the eye and to end in an odd broad point behind it.

The bird was minutely larger than some of the other juncos in the flock, but still obviously much smaller than the white-throated sparrows.

If this is not just an even weirder than usual junco, what might it be? There are numerous records and reports of apparent hybrids between slate-colored juncos and white-throated sparrows, among them the winter birds well photographed and well described by Mark Szantyr a few years ago in Connecticut.

Nearly all of the documented individuals assigned to this hybrid combination are obviously, conspicuously intermediate in appearance, combining a white throat and lore with a gray breast and head. Some are more subtly marked, such as the one photographed by Szantyr and almost entirely junco-like but for a single brown, white-tipped greater covert. And surely others, perhaps the majority of them, are even more cryptically clad, indiscernible to humans and maybe even to their flock mates.

If in fact this odd sparrow was a hybrid or introgressant, I’m not sure we can tell with any real certainty which species might be lurking in its family tree. To my eye, the very fine back pattern and incomplete vent strap immediately suggested not a Zonotrichia but rather a Lincoln’s sparrow, but we will probably never know.

We’ll probably never know. But it’s always fun to look close; if it weren’t, we wouldn’t bother looking at all.

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