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Candling a Tree Swallow Egg

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Published on Jul 8, 2012

This a video of me candling Tree Swallow egg # 5 of 5 about half way through the incubation cycle. Notice first off the capillaries throughout the egg which carry nutrients from the yolk to the embryo. Look a little harder and you can see the chick attached to the yolk by the stomach floating around in the albumen . Interestingly enough when the chick hatches for a few days you can see the remaining portion of the yolk through the skin.

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