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Feather Maintenance: Sunning

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Jul 21, 2009 | by Adrian Binns

We have had a wonderful string of sunny days (until today) and it was no surprise that during this gorgeous weather the birds were out in full force taking in the sun.

Feather maintenance is of major importance to birds, and anting, preening, oiling, bathing, dusting and sunning are all part of their feather care. On a daily basis birds will almost certainly do one of these activities in order to keep their feathers in tip-top shape.

Yesterday I found a Mourning Dove in this unnatural pose (above) – laying on its belly with one wing extended and the tail spread to meet the wing. I have seen Blue Jays and American Robins in almost the same pose, with both wings extended, head lifted and tilted, and mouth open; and Mourning Doves leaning to one side with a wing raised to catch the sun’s rays.

While it seems obvious that these birds are sunning themselves no one seems to be 100% sure as to why they do this. Does spreading the feathers and exposing them to the sun help to dislodge feather parasites, such as mites and lice? As direct sunlight produces energy through heat absorption, does this behavior reduce a birds need for food? Birds require vitamin D and ultra violet light helps convert oil molecules in the preening gland into vitamins, but how effective is this? Maybe it is a combination of all of the above?

photo © adrian binns

2 Comments

  1. NOBIAH on July 21, 2009 at 3:41 PM

    Check out the episode about bird watching on MEET ME AT THE CORNER, Virtual FIEld Trips for Kids. (www.meetmeatthecorner.org). It is an interview with the head of New York City Audubon . The video is filled with tips for young people on how to get started in the hobby of bird watching.

  2. Adrian Binns on July 30, 2009 at 3:08 PM

    Thank you. Most interesting and well done.
    A

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