Great Valley Museum
Central Valley Bird Egg Collection

*Oology is a branch of ornithology studying bird eggs, nests and breeding behaviour. The word is derived from the Greek oion, meaning egg. 

The Great Valley Musem has prepared a collection tray with sample eggs from 44 Central Valley nesting bird species. Click the image below to see the entire collection full-sized or click the individual species links below to see more details about each egg in the collection.

The species are listed by egg sizes, from smallest (Anna's Hummingbird 0.5 inches) to the largest (Turkey Vulture 3.0 inches). Click on a species to see more about it egg.