Bring in the cows

Grazing may be the best hope for a threatened butterfly

  • A bay checkerspot butterfly on a tidy-tips wildflower on Coyote Ridge near San Jose, California.

    Thomas Nash
  • Conservation biologist Stuart Weiss has found that areas grazed by cattle for a short period, like those on his side of the fence, are better butterfly habitat than ungrazed areas like those across the fence.

    Thomas Nash
  • Cattle eat invasive grasses on one area of Coyote Ridge, before being moved on to another.

  • Native goldfields and poppies blanket Coyote Ridge above California Hwy. 101, where pollution helps invasive grasses thrive, if they're not kept in check by grazing.

    Thomas Nash
 

Page 4

This year, the numbers have been coming in on the low end, due in large part to the fact that the spring of 2008 (when these future butterflies hatched) was the fourth driest since 1895. But it's not just climate that regulates the population, Weiss says. Checkerspots also respond to internal rhythms. In some years, for example, caterpillars become so numerous on a particular hillside that they decimate the dwarf plantain, setting the stage for a population crash in the next generation.

What makes Coyote Ridge so valuable is its size. If a newly emerged butterfly finds itself on a slope with few flowers, it can fly off to find a better location without ending up smashed on a windshield or marooned in a grass-choked field. Coyote Ridge is also topographically rugged, another important asset. Flowers on north-facing slopes bloom up to four weeks later than those on south-facing slopes, which extends the seasonal availability of nectar. In similar fashion, dwarf plantain stays green longer in shaded locations.

Weiss is encouraged by the fact that government officials in San Jose and Santa Clara County have gotten behind a plan to preserve much of the South Bay's remaining serpentine grassland, the largest portion of which lies on Coyote Ridge. Significantly, the plan -- which envisions protecting some 4,000 acres through conservation easements or outright land purchases -- embraces grazing as a management tool.

As lengthening shadows announce the end of the day, Weiss heads back down Coyote Ridge, passing through the series of gates that divide one property from another. At the last gate, I find myself looking back at the ecological equivalent of the border between two countries. Outside the gate lies a monotone of grass; inside, wildflowers have created a canvas worthy of Claude Monet or Vincent van Gogh. "Eye candy," Weiss smiles, and indeed it is, for people and butterflies alike.

J. Madeleine Nash is a freelance journalist and science writer based in San Francisco, California.

High Country News Classifieds
  • COMMUNICATIONS AND OUTREACH ASSOCIATE
    Communications and Outreach Associate Position Opening: www.westernlaw.org/communications-outreach-associate ************************************************* Location: Western U.S., ideally in one of WELC's existing office locations (Santa Fe or Taos, NM, Helena,...
  • FREELANCE GRAPHIC DESIGNER & PROJECT COORDINATOR (REMOTE)
    High Country News (HCN) is seeking a contract Graphic Designer & Project Coordinator to design promotional, marketing and fund-raising assets and campaigns, and project-manage them...
  • FILM AND DIGITAL MEDIA: ASSISTANT PROFESSOR OF INDIGENOUS MEDIA, CULTURAL SOVEREIGNTY AND DECOLONIZATION (INITIAL REVIEW 12.1.21)
    Film and Digital Media: Assistant Professor of Indigenous Media, Cultural Sovereignty and Decolonization (Initial Review 12.1.21) Position overview Position title: Assistant Professor - tenure-track Salary...
  • REAL ESTATE SPECIALIST
    To learn more about this position and to apply please go to the following URL.
  • ENVIRONMENTAL GEOPHYSICS
    "More Data, Less Digging" Find groundwater and reduce excavation costs!
  • RARE CHIRICAHUA RIPARIAN LAND FOR SALE
    40 acres: 110 miles from Tucson: native trees, grasses: birder's heaven::dark sky/ borders state lease & National forest/5100 ft/13-16 per annum rain
  • CENTRAL PARK CULTURAL RESOURCE SPECIALIST
    Agency: Oregon Parks and Recreation Department Salary Range: $5,203 - $7,996 Position Title: Central Park Cultural Resource Specialist Do you have a background in Archaeology...
  • STAFF ATTORNEY
    Come live and work in one of the most beautiful places in the world! As our Staff Attorney you will play a key role in...
  • ARIZONA GRAZING CLEARINGHOUSE
    Dedicated to preventing the ecological degradation caused by livestock grazing on Arizona's public lands, and exposing the government subsidies that support it.
  • OPERATIONS MANAGER
    Position Summary: Friends of the Inyo (friendsoftheinyo.org) is seeking a new Operations Manager. The Operations Manager position is a full-time permanent position that reports directly...
  • WATER RIGHTS BUREAU CHIEF
    Water Rights Bureau Chief, State of Montana, DNRC, Water Resources Division, Helena, MT Working to support and implement the Department's mission to help ensure that...
  • EXECUTIVE DIRECTOR
    The Amargosa Conservancy (AC), a conservation nonprofit dedicated to standing up for water and biodiversity in the Death Valley region, seeks an executive director to...
  • DEVELOPMENT & OUTREACH ASSOCIATE
    Southeast Alaska Conservation Council is hiring! Who We Are: The Southeast Alaska Conservation Council (SEACC) is a small grassroots nonprofit based out of Juneau, Alaska,...
  • DESERT LANDS ORGANIZER
    Position Summary: Friends of the Inyo seeks a Desert Lands Organizer to assist with existing campaigns that will defend lands in the California desert, with...
  • IDAHO CONSERVATION LEAGUE
    Want to help preserve Idaho's land, water, and air for future generations? Idaho Conservation League currently has 3 open positions. We are looking for a...
  • LUNATEC ODOR-FREE DISHCLOTHS
    are a must try. They stay odor-free, dry fast, are durable and don't require machine washing. Try today.
  • EVENTS AND ANNUAL FUND COORDINATOR
    The Events and Annual Fund Coordinator is responsible for managing and coordinating the Henry's Fork Foundation's fundraising events for growing the membership base, renewing and...
  • EDUCATION DIRECTOR
    Position Description: The Education Director is the primary leader of Colorado Canyons Association's (CCA) education programs for students and adults on the land and rivers...
  • 10 ACRES OF NEW MEXICO HIGH DESERT
    10 Acres of undeveloped high desert land in central NM, about 45 minutes from downtown Albuquerque. Mixed cedar and piñon pine cover. Some dirt roadways...
  • WATERSHED RESTORATION DIRECTOR
    $58k-$70k + benefits to oversee watershed restoration projects that fulfill our strategic goals across urban and rural areas within the bi-national Santa Cruz and San...