Desert songbirds struggle with more frequent heat waves

The number of days Southwestern birds face deadly dehydration may be increasing.

 

Because of human caused climate change, the desert Southwest’s heat waves are projected to become more frequent, intense and widespread. According to recent research, this may take a deadly toll on songbirds by century’s end. Songbirds don’t sweat, but because they pant when they’re hot, they still lose water staying cool. During heat waves, birds can lose so much water trying not to overheat that they die of dehydration. Most animals can’t survive losing more than 15 percent of their body mass to dehydration.

Maps: Thomas P. Albright et al., "Mapping evaporative water loss in desert passerines reveals an expanding threat of lethal dehydration." Photos: Alan D. Wilson/Wikimedia; Aaron Fellmeth Photography/Flickr; Aaron Maizlish/Flickr

Based on climate projections for the Southwest, small birds such as the lesser goldfinch may face lethal dehydration on average 25 days per year by the end of the century. Larger songbirds, such as curve-billed thrashers and Abert’s towhees, lose water at a lower rate, so they won’t be as vulnerable to dehydration until temperatures get much higher. But even bigger birds face risks: For some, small ranges restrict them to hot deserts and unpredictable water sources. Birds spend the hottest parts of the day seeking shelter in cool hideouts, making havens such as mountains, trees and shaded washes increasingly important.

Thumbnail photo courtesy of Aaron Maizlish/Flickr.

Maya L. Kapoor is an associate editor at High Country News.

High Country News Classifieds
  • GILA NATIONAL FOREST
    9+ acre inholding. Passive solar strawbale off the grid and next to the Continental Divide Trail in ponderosa pine/doug fir forest at 7400.
  • HIRING BEARS EARS EDUCATION CENTER DIRECTOR
    Conservation nonprofit Friends of Cedar Mesa in Bluff, Utah is hiring an Education Center Director to oversee the operation of the Bears Ears Education Center....
  • PROGRAM MANAGER, SUSTAINING FLOWS
    Friends of the Verde River, Cottonwood, AZ. Apply at https://verderiver.org/employment-opportunities/
  • PROGRAM ASSOCIATE - VERDE RIVER EXCHANGE
    Verde River Exchange - Friends of the Verde River, Cottonwood, AZ. Apply at https://verderiver.org/employment-opportunities/
  • CODE COMPLIANCE OFFICER
    Teton County Planning & Building is hiring! Our ideal candidate is a team-player, a problem-solver, pays attention to detail, and can clearly communicate technical material...
  • ARCHITECTURE DRAFTSPERSON/PROJECT MANAGER
    Studio Architects is seeking a full time Architectural drafts-person/project manager with1-3 years of experience to join our firm. At Studio Architects our mission is to...
  • ASSISTANT MANAGER/TRAINEE, COLORADO RANCH
    needed for 16,000+ acre conservation property in south central Colorado. Qualified candidate would have experience working on a ranch or wilderness property, general forestry/fire management...
  • FARM HAND &/OR NANNY IN ESCALANTE
    Nanny for 18-mnth-old. Yearly salary, vacation, health insurance. Spanish/other foreign-language native spkr prefrrd.
  • EXECUTIVE DIRECTOR
    Washington Association of Land Trusts seeks an ED to build on WALTs significant success & to lead the association to new levels of achievement. See...
  • BEAUTIFUL CUSTOM STRAWBALE HOME IN WESTERN COLORADO!
    Secluded, energy efficient Southwestern home on 40 wooded acres. Broker - Rand Porter - United Country Real Colorado Properties. 970-261-1248, $425K
  • FORMER RETREAT CENTER/CONSERVATION PROPERTY FOR SALE
    57 acres in Skull Valley, AZ, 17 miles from Prescott, year-round creek, swimming holes, secluded canyon, hiking/meditation trails, oaks, pines, garden, greenhouse. House, office building,...
  • ARIZONA PUBLIC LANDS ORGANIZER
    Title: Public Lands Organizer About the Arizona Wildlife Federation (AWF) The AWF is a non-profit organization dedicated to educating, inspiring, and assisting individuals and organizations...
  • HISTORIC RANCH HOME W/ 20 ACRES
    Historic 1893 Ranch Headquarters. 4 Bdrm, 3.5 Ba, 4000 ft2. Remodeled 2002. Includes 2 studio apts, stables, arena, workshop, 5 RV hookups. Chirachua & Peloncillo...
  • VICE PRESIDENT OF RETAIL OPERATIONS
    The Vice President of Retail Operations will provide overall leadership and accountability for purchasing, product development, merchandising planning, visual merchandising, retail operational excellence, oversight and...
  • ASSOCIATE DIRECTOR
    Grand Staircase Escalante Partners seeks an experienced fundraiser with excellent communication and organizational skills.
  • MS ACCESS DATABASE PROGRAMER
    Looking for an access programmer. Contract position. Send resume with references and rates to: [email protected] www.prospace.biz
  • PROGRAM MANAGER
    position in Phoenix with the Babbitt Center for Land and Water Policy.
  • ROADS END CABIN NEAR YELLOWSTONE
    Vaulted ceilings, two fireplaces, two bedrooms, loft, jetted tub, wifi. Forest, mountain views. Wildlife. [email protected]
  • ACCOUNTING CLERK
    Our director is seeking to employ the services of an Accounting Clerk to assist with various accounting and administrative tasks. This is a great opportunity...
  • EXECUTIVE DIRECTOR, COMMUNITY RADIO PROJECT
    Community Radio Project, Cortez, CO (KSJD & the Sunflower Theatre). Visit ksjd.org and click on the Executive Director search link. CRP is an EOE.