Internet Naturalist – October 6, 2013

  • Why Dippers Dip | Audubon Magazine 093013
    [This story comes to you through a partnership between Audubon and BirdNote, a show that airs daily on public radio stations nationwide.] An American Dipper calls across a rushing mountain stream. Its rotund, stone-gray body bobs rhythmically up and down, its feet firmly planted. The bird’s white feathered eyelids flash like a semaphore. So why do dippers dip? Let’s consider three theories: One suggests the dipper’s repetitive bobbing against a background of turbulent water helps conceal the bird’s image from predators. A second asserts that dipping helps it sight prey beneath the surface of the water. A third theory holds the most promise. Dipping – as well as the rhythmic flicking of those flashy white eyelids – may be a mode of visual communication among American dippers in their very noisy environment. That dippers make exaggerated dipping movements during courtship and also to threaten aggressors lends support to this theory.
  • Meteor Explodes Over Ohio, Kills Two 2013 ~ ADG (UK) 092713
    The event was captured in northeast Ohio on a NASA all-sky camera in Hiram, Ohio, at 11:33 p.m. Spaceweather.com reported the meteor hit the atmosphere at 114,000 m.p.h. and was visible in 14 states. Fragments from the fireball reportedly hit a home in northern Adams County, Ohio, a few miles outside the city of Peebles causing a house fire. Those reports are unconfirmed. The six alarm fire left fireman battling the blaze into the early hours of the morning. It is unknown at this time if the residents made it out safely. A neighbor said the meteor crossed over the city and hit near the Locust Grove Cemetery just four miles from the Great Serpent Effigy Mound.
  • Raptor Sightings Map | National Audubon Society
    Interested in learning more about Audubon Centers and raptor hot spots across the continent?
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