I have several bird feeders and use these links often:

• http://www.birds.cornell.edu/programs/AllAboutBirds/
  
  
• http://www.realtimerendering.com/birds/birds.html

some great ideas!!!

• http://www.ltluk.com/links.html

Stomach brains?

http://www.ananova.com/news/story/sm_105441.html

http://www.mercksource.com/ppdocs/us/cns/harvard-health-reports/MerckSHR-sensitivegut092906/sections/sect1.htm