You are going to need a dedicated piece of software in order to run your web cam you will have to decide do you want to document it by video or still images taken a predetermined time frame example every 30 secs etc.
You will need plenty of space on your hard drive or a web site that you can upload the images to via the web cam software.
Birds high above in the trees Serenade the flowers with their melodies - Line from the song "A Lovers Concerto"
My photo gallery http://thekiwi.org/photography/index.php