CK-12 Foundation
Ck 12: Biology: Amphibian Reproduction and Development
[Free Registration/Login may be required to access all resource tools.] Covers the reproduction and development of amphibians.
University of Illinois
University of Illinois Extension: Constructing an Egg Candler
Directions on how to make a device to candle eggs, or check on the progress of the chicken embryo. Links to numerous incubation and embryology resources.
University of Illinois
University of Illinois Extension: Andling Eggs
Directions for candling eggs including the how and why of the egg candling process.
Other
American Egg Board: The Incredible Edible Egg Eggcyclopedia Candling
Brief description of egg candling, one of the tasks of the egg grader. This is part of The Incredible Edible Egg Eggcyclopedia, a searchable dictionary for all things having to do with eggs.