Candling

= Candling photos and descriptions: =

//What can be used to candle the eggs?//
1. **You need a bright light.** You don't need any special tools. You can use a very bright flashlight or build your own candler. However, one of the best candling instruments that we have found is the Ovascope. It will give you an unbelievable peek inside the egg of which you can simply view or take digital images and post them to your Schoolwires account. The students will love sharing the images with their families. For more information click the following link Brinsea Ovascope.

2. **You need a dark room.** The room should be near the incubator or in the same room as the incubator so you can put the eggs right back in after you are done.

//**The following information should help you to determine if the duck embryos are developing successfully.**// In the first few days, you may see a network of bloodvessels. About day seven, you should be able to see the embryo's eye, the shadow of its body and if your lucky, it may move for you!
 * [[image:DSC00878.JPG width="252" height="189" align="right" caption="Winner: Developing embryo (image taken with Ovascope)"]] WINNERS:** When embryos have developed, we call them "winners".


 * [[image:Quitter.png width="283" height="192" align="left" caption="Quitter (Egg that stopped developing)"]]

QUITTERS:** When embryos stop growing, we call them "quitters". You will see a thin, blood ring around the yolk. Quitters are removed from the incubator and thrown away.


 * [[image:Yolker.png width="270" height="192" align="right" caption="Yolker (Unfertilized egg)"]]

YOLKERS:** Some eggs in the incubator may not be fertile. We call those "yolkers". When you look at a yolker, you won't see a spot in the yolk, blood vessels or a blood ring around the yolk.