I ran across this interesting article about the aging characteristics of a specific species of birds. I thought that you all would be interested.

Great Tits Also Have Age-Related Defects

ScienceDaily (2011-03-09) -- The offspring of older great tit females are much less successful than those of younger mothers. Things mainly go wrong in the later stages of the upbringing, concludes an evolutionary biologist. For great tit females, it turns out to be a good idea to invest in generating offspring in the first years of life.

http://www.sciencedaily.com/releases/2011/03/110307130215.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+sciencedaily+(ScienceDaily:+Latest+Science+News)&utm_content=Google+Reader#

Pictured: The Great Tit