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  3. For lark's sake

For lark's sake

Port of Portland plans to save a species

by Lisa Appel, December 14 2016

Streaked horned larks (Eremophila alpestris strigata) are small birds compared with the vast open spaces of their required habitat. A sub-species of the horned lark, they are 6 to 8 inches long and distinguished by the more yellow and rusty tones of their feathers. The hops and skips of the male breeding dance and a distinct call also aid in identification.

Low population numbers prompted the U.S. Fish and Wildlife Service to list them as federally threatened in 2013 under the Endangered Species Act. These tiny birds face many dangers, including predation by crows, coyotes and northern harriers, as well as diminishing habitat. Their unique habitat requirements leave limited options in their native range of western Washington and Oregon.

The Sandy Island Conservation Area would be the first and only site managed solely for the conservation of streaked horned larks. It's a remote area where birds can nest and raise young – away from industrial development and the dangers of active aircraft.

Streaked horned larks are a disturbance-dependent species. Their historical habitats were grasslands affected regularly by flood and fire. However, developed shorelines, fire suppression and river damming have effectively removed those natural disturbances. Their preferred open, sparsely vegetated habitat is increasingly rare within their native range. In recent times, the bird primarily inhabits human-disturbed landscapes that mimic these features, such as mowed fields, sites of agricultural activity, dredged material placement sites and beaches.

Map courtesy of Center for Natural Lands Management

In the Portland metropolitan region, such landscapes are known to occur at Portland International Airport and Rivergate Industrial Park – yet both areas present hazards as highly urbanized sites. Owned by the Port of Portland, they are zoned as industrial and have specific purposes to support airport and industrial operations. At PDX, streaked horned larks face the additional danger of bird-plane collisions. Without routine management, the natural succession of vegetation will make both sites unsuitable within a few years.

To respond to the challenges of habitat loss, the Port recently submitted a proposed Habitat Conservation Plan for streaked horned lark conservation to the U.S. Fish and Wildlife Service. The plan allows for the Port to have an "Incidental Take Permit" to displace birds from industrial and airport land and create and manage habitat at the proposed Sandy Island Conservation Area. Development activities associated with the permit would occur outside of nesting season to avoid harm to the species.

To mitigate for development, the Port proposes to create and maintain 32 acres of land dedicated solely as streaked horned lark critical habitat at Sandy Island, a former dredged material placement site in the lower Columbia River. Active vegetation management at a dedicated conservation area provides important long-term benefits to birds. Without it, the site is expected to naturally “fill-in” with plant growth.

The U.S. Fish & Wildlife Service is taking public comment on the conservation plan through Jan. 6. 

The plan estimates that with the proposed site management, 148 nesting pairs would thrive over the duration of the 30-year permit term. The Sandy Island Conservation Area would be the first and only site managed solely for the conservation of streaked horned larks. It's located within species range of Rivergate and PDX, providing a convenient locale for displaced birds. It's also a remote area where they can nest and raise young – away from industrial development and the dangers of active aircraft.

A science advisory team of species experts from the Center for Natural Lands Management, American Bird Conservancy and The Nature Conservancy provided technical guidance on developing the plan. SWCA Environmental Consultants and AKS Engineering & Forestry, LLC, supported its development. The U.S. Fish and Wildlife Service, Federal Aviation Administration and other federal and state natural resource agencies, scientists and conservation organizations work with the Port to protect streaked horned larks.

The U.S. Fish & Wildlife Service is hosting a public comment period through Jan. 6 on the Federal Register website. Your comments are important, and can help shape the alternatives and factors considered when evaluating the project.

To learn more, please see the Port’s Streaked Horned Lark Fact Sheet. For more information on the plan, please contact me at lisa.appel@portofportland.com or 503.415.6047.

Lisa Appel

Lisa Appel is the environmental outreach manager for the Port of Portland, working with community stakeholders to advance sustainability. Previously she led education efforts on Great Lakes and urban watershed issues at Cranbrook Institute of Science in the Detroit area. She also worked on the Detroit River International Wildlife Refuge, where private organizations and community groups came together to focus on urban conservation. She has bachelor of science degree in botany from the University of Michigan and a masters of environmental management from Duke University. 

The Intertwine

P.O. Box 14039 
Portland, OR 97293

503-445-0991

info@theintertwine.org

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