During this time of year, many bird owners begin discovering eggs in their pets' cages. If you have only one bird, or if you keep your birds seperated, then babies aren't a possibility. But if you are one of the many bird owners that keep more than one bird in the same enclosure, then you will want to know whether or not those eggs are fertile. For a great illustrated guide to identifying fertile eggs, check out Candling Eggs from Nan & Flock's Bird Behaviorist's Website. It's a handy resource for those who need to know exactly what to look for.

More on Eggs and Breeding:

• Do You Really Want to Breed Your Bird?
  
• The Dangers of Egg Binding in Female Birds