Test your northern spotted owl egg development skills!
Click on the image or description that answers each spotted owl incubation question. How many will you get right?
In the first few days of incubation, the candled eggs don't look like much. Fresh eggs or newly laid eggs don't have a visible yolk or air cell. This does not mean that the egg is infertile, but that fertility cannot be seen yet.
Day seven of spotted owl incubation shows an embryo with no eyespot and lateral blood vessel branches on either side. Option 1 shows an egg on day nine. It has increased vascularization compared to day seven, and an eye spot beginning to be visible.
The best description of a candled northern spotted owl egg at this stage would be an eyespot. Though this candle does show a well-developed spider, once a spider is observed on day seven the observations recorded in the days after will be of newly present features; blood vessel thickness and distribution, and CAM percentage (visible when looking along the side of the egg which is not the case for this picture).
This shows the drawdown of Egg S from 2019. You can also see an external pip just above the last line of drawdown (in green).
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