Earliest Bird Embryo: Picture Gallery

Earliest Bird Embryo Pictures: Drawing of Bird From Dinosaur Era
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Dating back to dinosaur times, this 121-million-year-old fossil from Liaoning Province, China, is the earliest unhatched bird ever found.

The fossil does not have an egg tootha special structure many modern birds have on the top of their bills. The egg tooth is used for breaking eggs before hatching and drops off after hatching. The absence of an egg tooth in this fossil suggests the tooth was a later development in the evolution of birds.

Photo gallery by Chelsea Lane-Miller

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Photograph courtesy IVPP/Science
 
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