2 edition of Distribution and variation of the horned larks (Otocoris alpestris) of western North America found in the catalog.
Distribution and variation of the horned larks (Otocoris alpestris) of western North America
William Harroun Behle
|Statement||by William H. Behle.|
|Series||University of California publications in zoology,, v. 46, no. 3|
|LC Classifications||QL1 .C15 vol. 46, no. 3|
|The Physical Object|
|Number of Pages||316|
|LC Control Number||a 42003041|
University of California Publications in Zoology Distribution and Variation of the Horned Larks (Otocoris Alpestris) of Western North America Vol. 46, No. 3 by William H. Behle (Paperback) by William H. Behle ISBN , ISBN: Horned Larks are social birds and are often found in large flocks or in open country where there is bare ground or habitat with short vegetation. Horned Larks are very early breeders, they have been found to nest in February in their northern range. They lay 2 to 5 eggs which take 11 to 12 days to hatch. The female incubates.
Horned Lark. A Horned Lark is a fun bird to see while bird watching. Below are some tips to help you identify Horned Larks. We have also put together a list of fun Horned Lark t-shirts, Horned Lark bird patches, bird houses, bird feeders, binoculars, stickers and other fun bird watching items. The streaked horned lark is endemic to the Pacific Northwest, and is a subspecies of the wide-ranging horned lark. Horned larks are small, ground-dwelling birds, approximately inches ( centimeters) in length. The streaked horned lark has a dark brown back, yellowish underparts, a walnut brown nape and yellow eyebrow stripe and throat.
Horned larks are especially common in plowed agricultural regions, nesting early before vegetation has a chance to grow tall. If you visit open agricultural country anywhere in the state, you should find this species. Their camouflaged upperparts make them inconspicuous, but they often occur in flocks, and their movement against the ground, and. Randy MooreLatin name: Eremophila alpestris strigataStreaked Horned Larks are a subspecies of horned lark once found west of the Cascades from Oregon's Rogue River Valley and north to southwest British Columbia. They have experienced severe range retraction and currently occupy only the Willamette Valley, the Lower Columbia River Basin, and the southern Puget Trough.
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Horned Larks vary in color across North America. Some arctic-breeding birds have little or no yellow on the head, while Eastern and south Texas breeders have the head extensively yellow. Those breeding along the Pacific coast tend to be a brighter rufous on the nape, upper back, shoulders, and sides; elsewhere they are a sandier brown.
Distribution and variation of the horned larks (Otocoris alpestris) of western North America. Berkeley: University of California Press, (OCoLC) Document Type: Book: All Authors / Contributors: William H Behle. On open fields in winter, flocks of Horned Larks walk and run on the ground, examining the soil and stubble in search of seeds.
If disturbed, the flock makes away in swift, twisting flight, making soft lisping callnotes. This species, the only native lark in North America, begins nesting very early in spring in those same barren fields, and the tinkling songs of the males come from high. Horned Lark: Medium-sized lark with pale or dark brown upperparts and white underparts.
Face and throat are pale yellow to white and mask, cap, and ear tufts are black. Tail is dark with white edges. Forages on ground, usually in open fields. Eats seeds, grains, insects and small mollusks. Look carefully at a bare, brown field, especially in winter, and you may be surprised to see it crawling with little brown shapes.
When they turn, you may see a neat yellow face, black mask, and tiny black “horns” waving in the breeze. Horned Larks are widespread songbirds of fields, deserts, and tundra, where they forage for seeds and insects, and sing a high, tinkling song.
Horned Larks are found around the world, with a great number of subspecies. Three subspecies with distinct coloration and markings breed in Washington: the Streaked Horned Lark, the Pallid Horned Lark, and the Dusky Horned Lark. Horned Larks have reddish-brown upperparts streaked with dark brown, pale underparts, and a yellow face and breast.
Horned Larks are among the earliest nesting songbirds in Tennessee, laying eggs in early to mid-March. They usually raise two broods during the breeding season.
Clutch Size: 2 to 5 eggs, with an average of 4. Incubation: The female incubates the eggs for 11 days. Fledging: The male and female tend the young, which leave the nest in 9 to 12 days. Horned Larks, Eremophila alpestris. These birds are the only true lark in North America.
Larks are characterized by a long hind claw. They have small tufts of feathers on their head that makes them look like they have “horns.” Horned Larks are grassland birds, 7 to 8 inches long, brownish on top and whitish underneath.
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Distribution and variation of the horned larks (Otocoris alpestris) of western North America, (University of California publications in zoology) Behle, William Harroun Published by University of California press, Berkeley ().
DISTRIBUTION AND HABITAT. Horned larks are the only true lark native to the New World, though they are found around the world and have many distinct subspecies. They are common in all seasons across most of the U.S. and into Mexico, with summering grounds also throughout Canada & Alaska and wintering grounds along the Gulf Coast.
We investigate variation in life history patterns between two closely related subspecies of horned larks (Drovetski et al. ), one nesting at higher elevation in alpine habitat in British Columbia, Canada Eremophila alpestris articola, pallid horned lark, and the other in grasslands and sandy shorelines at lower elevation in the Puget.
STATUS. Lockwood and Freeman () consider Horned Lark as a common to uncommon resident in much of western and coastal sections of Texas, with breeding distribution more widely scattered and local elsewhere.
BBS data from 70 routes in Texas produce a statistically significant trend of % population change per year for the period Distribution map of horned lark In the open areas of western North America, horned larks are among the bird species most often killed by wind turbines.
Inthe U.S. Fish and Wildlife Service listed the subspecies streaked horned lark as threatened under the Endangered Species Act.
Adaptive Variation in Body Size and Skeletal Proportions of Horned Larks of the Sw Us [Niles, David M.] on *FREE* shipping on qualifying offers. Adaptive Variation in Body Size and Skeletal Proportions of Horned Larks of the Sw UsAuthor: David M. Niles. One of these, the Streaked Horned Lark, numbers fewer than 2, and was listed as Threatened under the Endangered Species Act in A rare subspecies of the widespread Horned Lark, this small, ground-nesting bird was historically found throughout the Pacific Northwest, from southwestern British Columbia to southwestern Oregon.
Today, it has. Predictor Importance for Horned Lark (Eremophila alpestris) Relative to All Species Boxplots provide a quick visual of the distribution of the variable importance from the random forest models from all species (black boxplot) and how each species fits into the overall distribution.
In Oregon, streaked horned larks breed in the Willamette Valley and are most common near the Corvallis Airport and in the central Willamette Valley. The range-wide total population of streaked horned larks is likely less than 1, individuals, with about in Washington and at least in Oregon.
The horned lark (Eremophila alpestris), called the shore lark in Europe, is a species of lark in the Alaudidae family found across the northern hemisphere.
Taxonomy, evolution and systematics. The specific alpestris is Latin and means "of the high mountains", from Alpes, the Alps.  The horned lark was originally classified in the genus Alauda. The horned lark Is suggested to have diverged. Horned Lark a. PALLID HORNED LARK. Otocoris alpestris arcticola.
Range. Breeds in Alaska and winters south to Oregon and Montana. This is the largest of the Horned Larks and has the throat white, with no trace of yellow. Its nest is built in similar locations and the eggs are like those of the preceding species.
THE BIRD BOOKc e Distribution and variation on the Horned Larks (Otocoris alpestris) of Western North America. University of California Publications in Zoology 46 (3): – Bowles, J.
H. 40 subspecies of Horned Larks recognized, 14 are in the Old World and 26 in the New (Peters, ). This study of behavioral and physiological adaptations of two sub- species of Horned Larks undertakes to compare an inland valley form from a relatively rnesic environment (E.
a. actia) with a .