• Parrots
  • Poultry
  • Birds of Prey
  • Pigeons
  • Passerine
  • Bird Accessories and feed
  • Game Birds
  • Wading birds
  • Sea Birds
  • Other birds
  • More
    All Categories
    • All Categories
    • Parrots
    • Poultry
    • Birds of Prey
    • Pigeons
    • Passerine
    • Bird Accessories and feed
    • Game Birds
    • Wading birds
    • Sea Birds
    • Other birds
    • Events
    • Services
    • Other Animals

    Birds Fly in the Face of Climate Change Expectations

    NewsBird NewsFriday 04 November 2011
    Share:
    US

    As we noted here in a recent post, a substantial body of research indicates that species tend to become smaller as a result of global warming and other climate change patterns.
     
    So researchers in California were surprised to find that West Coast birds, on the contrary, have been growing larger in recent decades.
     
    “We went into this expecting to find that birds are getting smaller, because that’s what’s been seen before,” said Rae Goodman, a biologist and the lead author of a new paper detailing the trend in the journal Global Change Biology. “The finding that birds are getting bigger draws into question what’s driving the change in size.”
     
    Ms. Goodman and her colleagues analyzed data dating back 40 years from two different California bird observatories. Body-mass and wing-span measurements of nearly 33,000 birds representing dozens of species collected from 1971 to 2010 were analyzed for variations over time.

    The researchers found that wing length had been steadily increasing and body mass had expanded. Some of the species migrate between Alaska and Latin America, while others breed locally or are short-distance migrants, but the rate of change in size did not depend on where the birds spent the majority of their longitudinal time.
      
     

    News
    Subscribe to our newsletter
    //