Methods for checking the pollination of Canary eggs :
The process of checking the pollination of eggs is important, leaving unfertilized eggs in the Nest will lead to its spoilage, and to contamination of the nest and live embryos, and the exclusion of unfertilized eggs will also help to leave the opportunity for the bird to take care of the remaining eggs, or hatching, and the following are the most popular approved methods for checking fertilized eggs:
Using wax or a flashlight :
It is the traditional method used to check the fertilization of eggs, and it is as follows:
- To begin with, 2-5 Days must have passed since the eggs were incubated before the process of examining them, in order to ensure that the embryo grows to the size that we can see.
- Take the eggs from the nest to examine them, and we have a safety period of 10 minutes, during which the embryos will not be affected despite the low temperature of the eggs, taking care not to leave the eggs close to a heat source so that the embryos do not die.
- Prepare a light source, for which a candle or a flashlight can be used.
- Highlight the egg, as the shell becomes transparent so that we can see what’s inside.
- We are looking for a dark dot filled with blood veins, which represents the embryo, so after that, we can clearly see the inner content of the egg.
- There are clear signs that enable us to identify the zygote, represented by the dark spot that indicates the formation of the embryo, the noticeable vascular network inside it, in addition to noticing the presence of movement inside it, which gives an indication of the existence of life inside the egg.
- If the embryo dies inside the zygote, we will notice spots of blood in the form of rings or strips, and because the embryo has died, we will not see the network of blood vessels that fed it.
- As for the unfertilized egg, which is called the sterile egg, it is very clear; because there is no vascular network or any spots of blood of different shapes inside the egg.
Laying eggs in water :
It is one of the old recognized methods for examining eggs, which is as follows:
- Waiting until the eggs have been laid for several days, so that the embryos have begun to develop and grow, without being affected by the transfer, and are at a mature stage that allows them to be detected without being harmed, as this may happen if they are transferred early, and on the other hand, late screening harms the chicks.
- Bring a container containing warm water, and you should pay close attention to the temperature of the water so as not to cause any damage to the eggs while examining them.
- Put the eggs in the bowl very carefully, so as not to do any damage to them, because the eggs are very fragile.
- Observe the eggs, and note whether the eggs floated to the surface of the water, or sank to the bottom or middle of the bowl.
- If the eggs sink, they are fertilized, as the formation of the embryo inside increases the weight of the eggs, and causes them to sink.
- If the eggs float, they are rotten, because the embryos do not form inside them, so their weight remains lighter and they float on the surface of the water.
Opening eggs :
It is the most accurate method, which is used to examine eggs in the early stages of incubation, and it is as follows:
- We break one of the eggs if its shell cracks, or we break a healthy egg; to check on the rest of the eggs.
- We check the details of the egg to find out whether it is fertilized or not.
- All eggs have a white spot whether they are fertilized or not.
- The fertilized eggs are characterized by containing a white spot in a round shape, and the white color of the spot will be completely opaque, it has hard and clear edges, and the spot is also surrounded by a lighter outer part of it, it is almost transparent in color.
- As for unfertilized eggs, they have a white spot of irregular shape, have a very pale and blurry white color.
Causes of the production of unfertilized eggs :
The production of unfertilized eggs is called infertility in birds, where infertility in birds is not by not producing eggs or lack of egg production (poor hatching), but by producing unfertilized eggs, unable to produce full-fledged embryos, which is a problem that has several causes, and in what comes some of the causes:
Poor nutrition :
Nutrition plays an important role in the production of healthy eggs. a lack of dietary calcium, sodium, and energy can lead to the production of less fertile eggs, and excessive intake of zinc supplements can lead to infertility in addition to the production of non-fertilized eggs.
Malnutrition may also result when the bird relies on seeds only in its diet, or when the diet lacks diversity and is devoid of leafy vegetables and eggs, which results in a lack of calcium, vitamin D, and other necessary minerals.
Hybrid eggs have a low ability to pollinate, and internal reproduction, that is, reproduction carried out between members of the same family, leads to a decrease in the quality of semen and physical defects.
Health problems :
Poor health for the couple will lead to a decrease in fertility or the death of chicks inside the eggs, so it is imperative to be followed up by a veterinarian, and checking the number of white blood cells will be important in this case, and it is worth mentioning that excessive medication may lead to fertility problems in males.
Social problems :
It is important to reduce the disturbances surrounding the birds during the breeding season, such as a large number of visitors, and the presence of some animals such as annoying dogs, animals, cats, and other birds, as it is necessary to combine the birds in order to mate in one quiet place, where they lay eggs, and then spawning occurs without problems.
Environmental problems :
Constant or almost constant temperatures must be maintained in the bird cage, because the extreme change in temperatures may adversely affect the birds, and the severity of the impact may reach temporary infertility, and affect the quality of eggs and their fertility.
It is worth noting that after laying eggs, it is necessary to provide a stable environment for its incubation, as the incubators must be placed in a place where they maintain a temperature of approximately 21 degrees Celsius, where all incubators can work with temperatures varying from (16-27) degrees Celsius, and it is possible to continue their hatchability at temperatures up to 33 degrees Celsius.
Care must also be taken to place the incubators in places out of direct sunlight, as it will contribute to raising the temperatures quickly inside the incubators, which will affect the eggs, and finally, the incubators should not be placed in a place with strong air currents, such as windows, doors, or air conditioning vents.