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The Fauna and Flora of Kerr County, Texas | home
Loons, Grebes, Pelicans, Cormorants, Anhinga | Herons, Egrets, Ibises, Spoonbill, Storks, Vultures | Ducks, Geese, Swans | Kites, Hawks, Eagles, Falcons | Grouse, Turkey, Quail, Rails, Cranes | Shorebirds, Plovers, Gulls, Terns | Doves, Pigeons, Cuckoos, Owls, Nightjars | Swifts, Hummingbirds, Kingfishers, Woodpeckers | Flycatchers, Shrikes, Vireos | Jays, Crows, Ravens, Lark, Swallows, Martin | Chickadee, Titmouse, Verdin, Bushtit, Nuthatches, Creeper, Wrens | Kinglets, Gnatcatcher, Thrushes, Mockingbird, Thrashers, Pipits, Waxwing | Warblers | Tanagers, Sparrows, Grosbeaks, Cardinals, Buntings | Blackbirds, Finches | Introduced, Feral and Exotic
Flycatchers, Shrikes, Vireos
Eastern Phoebe, Sayornis phoebe
Eastern Phoebe, Sayornis phoebe
Camp Rio Vista, 5 September 2002
photos © by tony gallucci
Eastern Phoebe, Sayornis phoebe
Camp Rio Vista, 5 September 2002
photos © by tony gallucci
Eastern Phoebe, Sayornis phoebe
Heart of the Hills Fisheries Research Station, Texas 27, 19 October 2002
photos © by tony gallucci
Eastern Wood-Pewee, Contopus virens
Eastern Wood-Pewee, Contopus virens
Camp Rio Vista, 8 September 2002
photos © by tony gallucci
Scissor-tailed Flycatcher, Tyrannus forficatus
Scissor-tailed Flycatcher, Tyrannus forficatus
Camp Rio Vista, one of two present, 1 September 2002
photos © by tony gallucci
Scissor-tailed Flycatcher, Tyrannus forficatus, fledgling
Camp Rio Vista, 2 September 2002
photos © by tony gallucci
Scissor-tailed Flycatcher, Tyrannus forficatus
Camp Rio Vista, 14 September 2002
photos © by tony gallucci
Scissor-tailed Flycatcher, Tyrannus forficatus
Twenty-three migrants perched in a bare tree in late afternoon with a handful of House Finches. Most of the
Scissor-tails were catching migrating Monarchs and eating them on the spot.
Cypress Park, Texas 27, 14 October 2002
photos © by tony gallucci
Eastern Kingbird, Tyrannus tyrannus
A single Eastern Kingbird dropped from the sky and landed on a hackberry stem at HOH on 9 September 2002, for a very rare, perhaps unique, fall record for Kerr County (tg/eb).
Eastern Kingbird, Tyrannus tyrannus
Heart of the Hills Fisheries Research Station, 9 September 2002
photos © by tony gallucci
Black-capped Vireo, Vireo atricapillus
The Black-capped Vireo, a federally-listed endangered species, is in its peak range in Kerr County. Two of the world's six largest populations are in the county, and at least a half-dozen other sizable groups reside here as well. The largest accessible population is that found on the Texas Parks & Wildlife Department's Kerr Wildlife Management Area in the west-central part of the county. Only one other population is pseudo-accessible and well-known, that at Spicer Ranch. Several other populations are accessible per se, but will not be disclosed here to protect those population whose existence may be tenuous if they become public.
The key to knowing where to find the bird to begin with is to be able to recognize habitat; then seeing the bird is dependent on a good ear, and much patience. Black-capped Vireos require dense shrubby vegetation, and there seems to be a correlation with vegetation growing in limestone outcrops . There are several keys to identifying the shrubbery they prefer. Foremost, it must have foliage to ground level. Any area that has been browsed by goats is likely to have had the leafy parts of the shrubs denuded near ground level and will not host these vireos. If you see goats you can be about 99% sure there are no Black-capped Vireos. Secondarily they prefer areas with openings and with some low to moderate grass cover.
Beyond that there is a fairly wide variation in what they choose. At Lost Maples SNA (in Bandera County) for example they are on moderately steep slopes in shrubbery that is mostly Mountain-Laurel. They also occupy some of this type of habitat at Spicer Ranch. At Kickapoo Caverns SNA (in Edwards and Kinney Counties) the shrub portion of their prime habitat is composed largely of Texas Persimmon. In the Kerr County populations however, the obvious habitat component is oak shinnery -- the knee-high sucker plants of the Scaly-bark or Bastard Oak. This seems to be Black-capped Vireo habitat at its finest as they seem to be densest in this type of vegetation. These shinneries grow outwards from single trees or pockets of small trees, and thus by default provide for the openings the birds prefer. Virtually all medium-sized and large populations of the bird in this county are in this habitat type.
Once you have located a likely area (try Rock Pasture and Bobcat Pasture at Kerr WMA), then you must attune your ear to the song of the bird. Sung almost all day long, but more emphatically and for longer sequences in the morning, the song is somewhat atypical for a vireo on two counts: the phrases are ever-changing; and the song can be a very loing sequence of strung-together phrases. The voice does have the quality of a vireo. By that i mean you will probably not have trouble identifying it as a vireo when you first hear it, assuming you are familiar with other vireos. But it does not repeat the same, or a similar, phrase over and over as do Yellow-throated and Red-eyed Vireos (virtually the same phrase repeated), or White-eyed and Bell's Vireos (slight variation from phrase to phrase). Instead each phrase is noticeably different, so much so sometimes that you're not sure it's the same bird on each phrase. It also differs markedly from the other vireos in that you hardly notice the pause between phrases. When encountering other males, in fact, the song becomes more rapid and emphatic and the pauses are lost altogether. This is known as run-on song, and despite the vireo-like "quality" of the song is most un-vireo-like.
After locating a singing male, you'll have to stick with it, follwoing it patiently untl it exposes itself on the outside of a bush. They are notorious skulkers, moving very slowly, singing several phrases from an interior branch before making a slight move, always watchful for caterpillars, which are about the only things that interrupt their singing. Once a bush has been worked over well, you may see them flit or fly to another shrub, only to disappear into the depths of it. Occasionally however, a bird will move to the outside of a shrub, jump to a perch on top of one, or rarely fly up into a small oak, and sing from an exposed branch. Those are the moments you are waiting for. Be patient, it will happen. And if the one you're following decides to shut up for a while (likely because it's near the nest, or bringing food in) then you can always just move down the way and find the next one.
In 1988 I produced an audiotape for the Texas Parks & Wildlife Department of the Voices of the Black-capped Vireo and the Golden-cheeked Warbler. I long ago gave away or sold all the extras i had of the production tape. However, i still have the master tape and would be happy to make copies for anyone interested in having one, for the cost of the tape and mailing. Check the "Ordering GCW/BCV Audiotape" page for more info.
Additional information on Black-capped Vireos can be found at these webpages:
Black-capped Vireo, Vireo atricapillus
photos © by tony gallucci
Red-eyed Vireo, Vireo olivaceus
Red-eyed Vireo, Vireo olivaceus
Mountain Home Bridge, 9 September 2002
photos © by tony gallucci
Blue-headed Vireo, Vireo solitarius
Blue-headed Vireo, Vireo solitarius
Mountain Home Bridge, 19 October 2002
photos © by tony gallucci
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