FreeLists / va-richmond-general / [va-richmond-general] UK study: How birds know when to sing to attract mates

[IE Ries <feathermom_chirpling@xxxxxxxxx>]

http://news.bbc.co.uk/1/hi/scotland/edinburgh_and_east/7305469.stm
   
  Excerpt from article:
   
              Research finds birdsong trigger 

                   Japanese quail were observed under varying amounts of light


  Birds know to sing in the spring because of hormones triggered by longer 
days, researchers have found. 
   
  Teams from the Roslin Institute near Edinburgh and Nagoya University in Japan 
have identified how part of a bird's brain is affected by seasons.      
Scientists found cells near the pituitary gland release a hormone in the spring 
in readiness for mating. 



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