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Streaked horned lark

Photo of Streaked-Horned Lark (Courtesy of Rod Gilbert)

Scientific name: Eremophila alpestris strigata

Status: Threatened

Critical Habitat: Designated

Listing Activity: The streaked horned lark was added to the candidate list in October 2001. On October 3, 2013, the streaked horned lark was listed as a threatened species under the ESA.. More information.

Potential Range Map

  • Description

    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 16−20 centimeters (6−8 inches) in length.  The streaked horned lark has a dark brown back, yellowish underparts, a walnut brown nape and yellow eyebrow stripe and throat. This subspecies is conspicuously more yellow beneath and darker on the back than almost all other subspecies of horned lark.  The combination of small size, dark brown back, and yellow on the underparts distinguishes this subspecies from all adjacent forms.

    Historical Status and Current Trend

    Historically, the streaked horned lark’s breeding range extended from southern British Columbia, Canada, south through the Puget lowlands and outer coast of Washington, along the lower Columbia River, through the Willamette Valley, the Oregon coast and into the Umpqua and Rogue River Valleys of southwestern Oregon. 

    The streaked horned lark has been extirpated throughout much of its range, including all of its former range in British Columbia, Canada, the San Juan Islands, the northern Puget lowlands, the Washington coast north of Grays Harbor, the Oregon coast south of Clatsop County, and the Rogue and Umpqua Valleys in southwestern Oregon.

    The current range of the streaked horned lark can be divided in to three regions:  (1) the Puget lowlands in Washington, (2) the Washington coast and northern Oregon coast, and the lower Columbia River (including islands and dredge spoil deposition sites west of Portland, Oregon), and (3) the Willamette Valley in Oregon. 

    An analysis of recent data estimates the current rangewide population of streaked horned larks to be about 1,170–1,610 individuals (Altman 2011).   There are about 900–1,300 breeding streaked horned larks in the Willamette Valley (Altman 2011).  The largest known populations of streaked horned larks are found at the Corvallis Municipal Airport (Corvallis, Oregon), the Olympia Regional Airport (Olympia, Washington), and at Joint Base Lewis-McChord in Washington. 


    Horned larks are birds of wide open spaces with no trees and few or no shrubs.  The streaked horned lark nests on the ground in sparsely vegetated sites dominated by grasses and forbs.  Historically this type of habitat was found in prairies in western Oregon and Washington, in dune habitats along the coast of Washington, on the sandy beaches and spits along the Columbia and Willamette Rivers, and in grasslands, estuaries, and sandy beaches in British Columbia.  Today the streaked horned lark nests in a broad range of habitats, including native prairies, coastal dunes, fallow and active agricultural fields, wetland mudflats, sparsely-vegetated edges of grass fields, recently planted Christmas tree farms with extensive bare ground, moderately- to heavily-grazed pastures, gravel roads or gravel shoulders of lightly-traveled roads, airports, and dredge deposition sites in the lower Columbia River.  Wintering streaked horned larks use habitats that are very similar to breeding habitats.

    A key attribute of habitat used by larks is open landscape context.  Our data indicate that sites used by larks are generally found in open (i.e., flat, treeless) landscapes of 120 hectares (ha)(300 acres) or more.  Some patches with the appropriate characteristics (i.e., bare ground, low stature vegetation) may be smaller in size if the adjacent fields provide the required open landscape context.  This situation is common in agricultural habitats and on sites next to water.  For example, many of the sites used by larks on the islands in the Columbia River are small, but are adjacent to open water, which provides the landscape context needed.   Streaked horned larks are found at many airports within the range of the subspecies; as native prairies and scoured river beaches in the Pacific Northwest have declined, airports, with their large area requirements and treeless settings, have become magnets for streaked horned larks. 

    Life History

    Nesting begins in late March and continues into late August. The nest consists of a shallow depression built in the open or near a grass clump and lined with fine dead grasses. The female commonly lays four greenish or grayish eggs speckled with brown. Incubation is only 11 days and the young are able to fly within 9 to 12 days after hatching.


    Larks eat a wide variety of seeds and insects, and appear to select habitats based on the structure of the vegetation rather than the presence of any specific food plants.

    Reason for Decline

    There are many ongoing threats to the streaked horned lark’s habitat throughout its remaining range from conversion to agriculture and industry, loss of natural disturbance processes, such as fire and flooding, followed by encroachment of woody vegetation, invasion of coastal areas by nonnative beachgrasses, and incompatible management practices.  The continued loss and degradation of its scarce habitat could push the subspecies closer to rangewide extinction.

    Other threats include inbreeding depression, low reproductive success, and declining population size, which have been documented in the Puget lowlands population.  Ongoing threats from aircraft strikes and training activities at airports have been documented, and put lark populations at risk of further population declines throughout the range of the subspecies.

    Conservation Measures

    An interagency group, the Streaked Horned Lark Working Group, has been active for over 10 years; the working group includes research biologists, federal, state and local government agencies, non-governmental organizations, and industry groups.  The focus of the group has been to develop a better understanding of the streaked horned lark’s biology and the current threats facing the subspecies.  Members of the Working Group have worked with land owners and managers throughout the range of the lark to encourage measures to improve habitat quality and minimize activities that could reduce nesting success.  Land managers are encouraged to maintain open habitats with low stature vegetation, and to avoid disruptive management activities during the breeding season.  Measures to protect streaked horned larks have been incorporated into the Comprehensive Conservation Plans for the Willamette Valley National Wildlife Refuge Complex and the Willapa National Wildlife Refuge, and the Integrated Natural Resource Management Plan at Joint Base Lewis-McChord.  Federal agencies, including the US Army Corps of Engineers and Federal Aviation Administration, have incorporated conservation measures for streaked horned larks into their activities.

    References and Links

    Altman, B. 2011.  Historical and Current Distribution and Populations of Bird Species in Prairie-Oak Habitats in the Pacific Northwest.  Northwest Science, 85(2):194-222.

    Stinson, D.W. 2016. Periodic status review for the streaked horned lark in Washington. Washington Department of Fish and Wildlife, Olympia, Washington. 21 + iii pp.

    U.S. Fish and Wildlife Service.  2019.  Species Biological Report for the Streaked Horned Lark (Eremophila alpestris strigata), Version 1.0. Interior Region 9, Portland, Oregon. 43 pp.  (


    Last updated: November 2019

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