Monday, December 31, 2018

Sparrows!


It’s that time of year again: sparrow season!  The subtleties of plumage and behavior in the various sparrow species make them a lot of fun to study, as most birders will affirm.  Because North America is rich in sparrows, I’m going to limit my focus mainly to the common sparrows of the Southeast.  Since I’ve also spent a lot of time in northwestern Arkansas, I’ll throw in a few species from that region, as well.  Who knows?  Some of them might show up in your backyard.

Probably the most abundant sparrow in woods and thickets in southeastern North America right now is the White-throated Sparrow.  Even when you can’t see these birds, you can usually find them by listening for their sputtering pink! calls.  They also sing quite frequently on the wintering grounds, and the song is a plaintive, whistled melody that is very easy to learn (a couple of helpful mnemonics are “Old Sam Peabody, Peabody, Peabody” and “Oh, sweet Canada, Canada, Canada”).  Some White-throated Sparrows have white “eyebrow” and crown stripes as well as white throats, while others are drabber, with buff-colored stripes.  
White-throated Sparrow
The White-throated Sparrow has a slightly larger cousin, the White-crowned Sparrow, which also has bold stripes on the head.  While White-crowned Sparrows are apparently very common in the winter months in many regions of the continent, they seem to be scarce where I live; I have seen them at only a handful of locations in Mississippi.  When I lived in Arkansas, however, I observed them regularly, usually from October to early May.  They even showed up at my feeders.  In my experience, you might have good luck searching for White-crowneds in habitats that are slightly more open and brushy than the usual places where you find White-throated Sparrows.  
White-crowned Sparrow
If the habitat is really open, as in fields and pastureland, you will likely find Savannah Sparrows.  These are small, short-tailed, brown-streaked sparrows with yellow lores (that is, the areas just in front of the eyes).  These birds have high-pitched, insect-like calls and usually forage in loose flocks.
Savannah Sparrow (perched in willows, yes, but in a marshy field)
The Chipping Sparrow and the Field Sparrow are other common sparrows of more open types of habitats.  The Chipping Sparrow is numerous throughout the year in the Southeast, while the Field Sparrow is a bit harder to find.  However, like the Chipping Sparrow, it commonly breeds in southeastern North America.  The bouncing, trilling song of the Field Sparrow is one of my favorite sounds to hear in old fields and brushy cedar groves in the summer.  The Chipping Sparrow’s dry, almost mechanical-sounding song, on the other hand, may not be as aurally pleasing, but hearing it always reminds me of the open pine woodlands where the species usually nests.
Chipping Sparrow being banded
Field Sparrow
As far as plumage goes, both Chipping and Field Sparrows have plain underparts, prominent wing bars, and long tails.  Field Sparrows’ outer tail feathers are white—a useful field mark to remember when the birds are flitting away from you.  The Field Sparrow’s white eye ring and pink bill are distinctive year-round, while the Chipping Sparrow becomes somewhat drabber after molting into winter plumage—although it does retain its eye-line and crown. 

Song Sparrows commonly occur throughout most of the United States during the colder months.  In many regions, they are year-round residents.  In Mississippi, however, they are gone by mid-spring, even though the males will occasionally sing their territorial songs in the winter.  I finally heard actual breeding Song Sparrows—not just the out-of-season songs—in northern Alabama and Georgia this year, which was a treat.  Away from Song Sparrow breeding territories, you’re far more likely to hear the nasal, raspy call that the birds use for contacts and alarms.  The Song Sparrow is pretty distinctive in appearance, being fairly large and long-tailed.  It has brown streaks on its breast and sides, and a very prominent central breast spot.
Song Sparrow
All that said, the Song Sparrow may be confused with the Lincoln’s Sparrow in places where both species are common.  In my part of the southeastern U.S., Lincoln’s Sparrows are quite rare during the winter.  However, when I lived in northwestern Arkansas, I saw many of them.  They’re smaller than Song Sparrows, with shorter tails and more grayish coloration on their heads.  If Song Sparrows look as though their jagged breast markings were drawn with crayons, then Lincoln’s Sparrows look like they’ve been finely penciled. 
Lincoln's Sparrow
Lincoln’s Sparrows are closely related to the more abundant Swamp Sparrows, which—true to their name—love skulking in marshes, wetlands, and moist thickets.  Unlike Song and Lincoln’s Sparrows, Swamp Sparrows lack bold underpart markings; the patterns on their breasts and bellies are more like smudgy watercolor.  Their reddish wings and gray-and-brown heads make them easy to recognize, and their chip calls are louder and more emphatic than those of most other sparrows.  
Swamp Sparrow -- note gray head and reddish wings
Swamp Sparrow underpart view
The Fox Sparrow is another of the relatively common wintering sparrows.  As its name suggests, it—or, at least, its eastern form—is patterned with bright rufous streaks and stripes.  In western North America, there are other color forms in addition to the “red” one.  To be honest, I don’t see these large and flashy sparrows particularly often where I live.  My tip for finding them is to check in thickets of berry-producing shrubs and vines in wooded areas.  When I find Fox Sparrows, they are usually single or in very small groups.  Keep alert for their loud smack! calls.  
Fox Sparrow -- note yellow bill, gray on head, and extensive rufous coloration.
Now let’s look at a sparrow that isn’t brown, but slate-gray and white.  The Dark-eyed Junco is a common wintering species in thickets and open woods all over the U.S.  If you have bird feeders, you may see it feeding in small flocks on the ground.  When startled, the birds give trilling flight calls and flash their white outer tail feathers.
Dark-eyed Junco
For good measure, here are some other sparrow species that I saw when I lived in Arkansas.  Unlike the previous birds, all of these are very rare in Mississippi.  My time spent observing them out-of-state will hopefully come in handy, though, if they ever show up around my current birding spots!

One of my favorites, mainly for its flashiness, is the Harris’s Sparrow.  This is an enormous sparrow, even bigger than Fox Sparrows, and its bold black crown and “beard,” along with the salmon-pink bill, draw the eye.  I spotted this particular Harris’s from my apartment window while I was working at my desk one day in late April.  You can tell that it is in breeding plumage rather than winter plumage, since its head is pale gray instead of buff-colored.  This was an interesting day for migratory birds, actually; a Rose-breasted Grosbeak landed in the thicket shortly after I snapped pictures of the sparrow.  Harris’s Sparrows are mainly western birds and occur very rarely in Mississippi.
Harris's Sparrow
The bird in the photo below appeared, along with a companion that I didn’t manage to photograph, in the woods near my apartment on a warm day in May.  Although the identification of these birds was quite evident to me—despite the fact that I hadn’t seen this species before—  I thought that, in looks and behavior, these Clay-colored Sparrows were uncannily similar to Chipping Sparrows—but also just different enough that they stood out from the other birdlife in the area.  While Clay-colored Sparrows pass through Arkansas (and much of central North America) during migration, relatively few of them travel through Mississippi. 

Clay-colored Sparrow
An even more unusual species for Mississippi is the American Tree Sparrow.  American Tree Sparrows showed up in my “yard” in moderate numbers during a snowy winter in Arkansas.  Like Chipping Sparrows, they have very plain and pale breasts—at least, for the most part: one of the key field marks of the American Tree Sparrow is a single dark spot in the center of the breast.  This species is commonly found farther north than the area where I currently live, but there have been sightings in more southerly regions.  At any rate, I’m glad that I have had the chance to see it.

American Tree Sparrows and Dark-eyed Juncos
Although sparrows can sometimes be confusing to sort out in the field, the key is to pay close attention to their plumage, behavior, and habitat.  Familiarizing yourself with the common species in your area will also help you to detect rare and unusual species more quickly.  Happy sparrow-watching!

Friday, November 30, 2018

Scissor-tailed Flycatcher Nest...in Mississippi!


My first Scissor-tailed Flycatcher sighting occurred several years ago while I was waiting at a bus stop in Fayetteville, Arkansas.  I’ve seen these birds countless times since then, and even noticed some recently fledged young from time to time.  That was in Arkansas, though.  The species is rare where I now live; any Scissor-tails that show up east of the Mississippi River tend to garner a lot of attention from birders.  So when a pair of Scissor-tails nested in a rural part of Lowndes County, MS, south of Artesia, back in spring/summer 2015, I was thrilled.

Scissor-tailed Flycatcher in Lowndes County, Mississippi
I went out to the area with a couple of my family members, hoping to see the birds and their nest.  It wasn’t too difficult to spot the adults.  With their gorgeous streamer-like tails, loud calls, and exuberant foraging behavior of sallying out to catch flying insects, Scissor-tails are the polar opposite of inconspicuous.  And their habitat, wide open fields with a few trees and shrubs, doesn’t provide much in the way of concealment.  That said, I suppose that trying to find this species in Mississippi really can be a bit like looking for a needle in a haystack, given how many farms and fields there are to search.

One of the Lowndes County Scissor-tails
The birds had built a nest very high up—probably a good 80-85 feet—on a cell tower.  The species typically builds nests at much lower levels than this; a study in Texas (Nolte and Fulbright 1996) showed that the average nest height was a little over 9 feet, or 2.8 meters.  The highest nests found during field research in Texas in the late 1940s were built 26 ft., 10 in. up on the cross-arm of a telephone pole (Fitch 1950).  The author, Frank Williams Fitch, Jr., referred to these telephone pole nests as “unusual.”  I wonder what he would have made of the cell phone tower nest near Artesia!  To be fair, I doubt that many mid-20th-century field ornithologists had any inkling of how drastically the landscape would change as a result of technology.

Maybe the Lowndes County flycatchers simply felt more secure at the tower than they would have if they had nested in a shrub.  Aerial predators wouldn’t have had any trouble accessing the nest, of course, but I expect that the height would have deterred most other potential nest raiders.  The nest is in the center of the photo below.  You can just barely make out the grasses, stems, and roots hanging down from the metal bar.


                                                            And zoomed in:


Scissor-tailed Flycatchers lay 3-6 eggs, but I knew that I wasn’t going to be able to see any eggs from the ground!  Nest cameras certainly would’ve been helpful here. 
 
Can't really see anything...
The December 2016 issue of The Mississippi Kite contains a mention of these nesting Scissor-tails (Vol. 46, No. 2, p. 19).  It says that they were observed from April 22 to July 17.  This would have given them ample time to build the nest (a process that takes a few days), deposit the eggs (females lay one a day), incubate their eggs (which the females usually take about 14 days to do) and raise the nestlings (a task for both parents that averages 15.4 days).  Sometimes Scissor-tailed Flycatchers take up to four weeks’ time between nest-building and egg-laying.  I can only assume that there must be some benefit (or at least no drawback) to taking things easy, or surely the birds wouldn’t do it.  On the other hand, maybe Scissor-tails are using most of this “extra” time to defend and secure their territory, and aren’t being lazy at all.  It’s worth considering, right?

To conclude, here are some better-quality pictures of Scissor-tails that I took at a couple of different locations in Arkansas:

May 29, 2014
June 13, 2015
References: