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 Eastern
Meadowlark
In North America there are two very similar species of
meadowlark. The Western Meadowlark (S. neglecta)
ranges throughout the West from central British Columbia
east to western Ontario and south to central Mexico. The
Eastern Meadowlark has a far more extensive range,
occurring from central Quebec throughout the eastern
United States west to Nebraska and Texas, south along
Mexico's Caribbean coast through Central America to
Amazonia. Eastern Meadowlarks tolerate extremes of
climate from hot tropical lowlands to cool meadows at
11,500 feet in the Andes Mountains. Both species have
experienced range expansions in North America since
colonial times, and their ranges now overlap. In the zone
of overlap, each species defends territories against the
other. The Western Meadowlark tends to use drier areas
than the Eastern Meadowlark does. Distinguishing the two
species can be very difficult because of similarities in
their behavior and plumage, but they do have distinctive
voices.
Eastern
Meadowlark Range Map
A disjunct population of Eastern Meadowlark in the desert
grasslands of southern Arizona and New Mexico, western
Texas, and northern Mexico is considered by some to merit
species ranking. Known as Lilian's Meadowlark, it is
distinguished by subtle plumage differences and voice
from the Western Meadowlark. Curiously, where Lilian's
and Western Meadowlarks occur together, the Lilian's
takes the drier territories.
Southern Eastern Meadowlark populations are sedentary,
but at the northern edge of the range they are partially
migratory, avoiding areas with deep snow in winter. Large
flocks from twenty to a few hundred birds form during
migration. In the parts of the range abandoned during the
winter, the males arrive several weeks ahead of females
to claim territories. Males display to each other, and
later to females, by tilting the bill upward and showing
the bright yellow breast and black breast band. Another
display is the jump-flight, where rivals leap into the
air one after the other, fluttering their wings with tail
cocked upward and feet dangling. The plaintive slurred
"Spring-of-the-year" song is given
from fence posts or other elevated perches most often
during the formation of territories.
Males are commonly polygamous, with two or three females
sharing a male's territory. Females begin several nests
before selecting one to finish and eventually laying
three to five speckled white eggs. Female meadowlarks
construct nests in small depressions scratched out by the
bird or sometimes in hoofprints made by cattle or horses.
The nests have a domed roof of grasses woven into
neighboring plants and a large side entrance.After about
two weeks of incubation, the young hatch. Both parents
feed the young for the 11 to 12 days until fledging. Once
the young have fledged, the male may assume most of the
care if the female renests.
Like other icterids, Meadowlarks can find food by
gaping--forcibly opening their bills--in soil or in plant
stalks to expose hidden prey. About three-quarters of
their food is insects and other invertebrates. They also
eat seeds and berries.
Description: Meadowlarks are chunky
short-tailed birds with blackish-brown and buff streaked
upperparts and wings. They have a striped black and white
crown, a yellow and white area on the side of the head
above the eye, or supercilium, and a black stripe through
the eye extending back and curving down to the nape. The
underparts are bright yellow with a prominent black V
extending across the breast. There are dark streaks at
the flanks. The outer tail feathers are white. The long
and sharply pointed bill is bluish-gray and darker along
the top ridge and at the tip.
Without the song, separating meadowlark species is a
challenge. The simple and clear slurred whistle of the
Eastern Meadowlark is quite distinctive from the
lower-pitched and more flute-like warbled song of the
Western Meadowlark. Eastern Meadowlarks tend on the
average to be darker and more rufous-tinged than Western
Meadowlarks; the buffy flanks are marked with continuous
streaks. Western flanks are whitish with more broken
streaks. The tail usually has more white on Eastern
Meadowlarks, and the malar feathers along each side of
the lower jaw is white in Eastern and yellow in Western
Meadowlarks. Lilian's Meadowlark differs from Western
Meadowlarks in having much more white in the tail, more
head contrast, and paler cheeks. Like typical Eastern
Meadowlarks it has whitish malar areas, but overall it is
pale like a Western Meadowlark.
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