The most commonly detected bird species were the red-eyed vireo
, Acadian flycatcher, worm-eating warbler, and eastern wood-pewee (counts and scientific names found in Table 1).
The narrowest observed elevational ranges were generally evident in a handful of species that are restricted to relatively low (for example, Belted Kingfisher, Willow Flycatcher, Red-eyed Vireo
, Veery, Brown-headed Cowbird) or relatively high (for example, Clark's Nutcracker, Horned Lark, Mountain Bluebird, American Pipit) habitats in the parks.
Slow migrators, such as the red-eyed vireo
or the great crested flycatcher, were the most adaptable to changes.
Among other migratory passerines, densities exceeded 1 individual/ha at all three sites for Eastern Wood-Pewee, Acadian Flycatcher, Wood Thrush, Great Crested Flycatcher, Indigo Bunting, Blue-gray Gnatcatcher, and Red-eyed Vireo
The red-eyed vireo
is a bird more common to Eastern deciduous forests, and while uncommon in the West, Elijah Bristow is one of the few places where it is often found.
After I got home, another red-eyed vireo
turned up near Land's End, where I had been less than 24 hours previously.
Delving deeply into the details of birds ranging from the Killdeer (Charadrius vociferus), the Red-Eyed Vireo
(Vireo olivaceus), and the Mourning Dove (Zenaida macoura), to the Turkey Vulture (Cathartes aura), the Great Blue Heron (Ardea herodias), and forty-five others, Fifty Common Birds Of The Upper Midwest provides readers with a remarkable coverage of the birds routinely observed in the multistate area.
Other unusual recent visitors include a red-eyed vireo
at Liniclate, Benbecula, in the Outer Hebrides, and a blackpoll warbler at Loch Druidibeg, South Uist
Alternatively, frequent prescribed burning, timber harvest, and hardwood reduction may negatively impact some species, including tufted titmouse (Baeolophus bicolor) (9), ovenbird (Seiurus aurocapillus), red-eyed vireo
(10), and black-and-white warbler (Mniotilta varia; 5).
One declining species, the Tennessee warbler, is the third most common tower victim, after the ovenbird and the red-eyed vireo
. (Although the Conservancy's report mentions the endangered red-cockaded woodpecker, the two deaths cited do not constitute a major mortality factor for this non-migratory bird).
: Until recent population declines, red-eyed vireos
were one of the most common woodland birds in North America.
A couple of purple finches fly over, bluejays jay-jay from every direction (they'll stick around this Fall as long as the beaked hazelnuts hold out), and a red-eyed vireo
forages in a stressed red maple already showing color.