Humidity Level | D.M.P. Engineering

The incubation period in different species of parrots is variable.
For example, Military Macaw (Ara militaris) – 26 days of incubation while Blue & gold Macaw (Ara Araruna) 24-25 days.
Lasser Vasa Parrot (Caracopsis nigra) incubation time is shorter than any other parrot- 14-15 days when Grey Parrot (Psittacus erithacus erithacus) incubates 28-30 days.
The Australian Parakeets incubation period is mostly 20 days.

Following the above, there are different factors that influence the incubation time and make it inaccurate. It is hard to tell when is the exact moment in which the embryo is ready for hatching but this process can take up to 3 days from the moment of the first PIP.

So the question that is always being asked before hatching is: does the embryo need help in his hatching?

Let’s understand the hatching process: when ready to hatch, the embryo makes a PIP in the air pocket so he could get oxygen from outside and start breathing by himself.

From this moment the blood vessels around the inner egg-shell start to shrink and the blood is being absorbed into the embryo’s body. When the embryo’s body had absorbed all the blood, the vessels are sealed.

When the embryo starts tweeting, it is not a sign of stress.
On the contrary, it is an indication that the embryo has started breathing with his own lungs and that his condition is good.

Following 20 years of experience in incubation we know for sure that the best decision when to hatch is totally in the embryo’s “hands”; Even if we want to intervene, we don’t have any knowledge at what stage of the process the embryo is in so intervening can only cause damage.

Any interference from the moment of the PIP (first hole) until the egg-shell full ring opening can cause the embryo to die. Only after the egg-shell had parted into two parts, it is possible to help, as we can see often in nature.

The following video demonstrates the natural intervention only after the egg-shell is totally opened. The brooding mother eats part of this egg-shell, probably for her needs to Calcium and also feeds one other chick.

In addition, we can see that the brooding mother rolls the egg with her beak to ease the hatching process – a proof that in the incubator there is no need to stop the egg-tray movement before the hatching moment.

In another video made by Psittacus Catalonia, they show that they used to help the embryo with hatching. After starting to use the Inca incubators, they stop this procedure and received hatching results of 98%!

The unique design of the Inca Incubators avoids the necessity of any interruption during the hatching process; The relative humidity inside the incubator rises naturally while the embryo starts his hatching because of the egg’s fluids. This also makes it easier for the embryo to hatch because it prevents the coatings around him from drying out. That is also one of the reasons why managing the relative humidity in the incubator is not automatic; It allows the embryo to control the relative humidity percentages during the hatching process according to its needs.

After the hatching process had finished and the newly-born chick has been transferred into a brooder (with the same temperature as the incubator – 37.3 C),
The humidity level stabilized to its previous state.

One more point, this humidity increment during hatching is not harming the other eggs in the clutch as an average relative humidly is being kept along the incubating period.

The last video were taken at the last moments of hatching in the Inca 100 Incubator and It shows all that were explained before.

The 3 most important factors of the incubation process are Temperature, Movement (egg rolling) and Relative Humidity – a measure of the amount of water vapor in the air at a specific temperature. It is given as a percentage value. Relative humidity depends on the temperature of the air, as warm air can hold more moisture than cold air.

Originally, parrots in the wild of different regions were adjusted to different relative humidity percentages; e.g. the Amazon, the Macaw, or the African Grey from the Rain Forests were adjusted to higher RH values than the Cockatoo, the Rosella, or the Ring Neck from the dryer areas such as the Australian Outback.

However, parrots in captivity are bred outside of their natural habitat, and therefor the RH values in these new environments might not be as optimal for egg incubation. In addition, the optimal relative humidity values for the same species could be different for various climates.

During the embryo’s development, fluids in the egg are evaporated contributing the egg’s weight loss. By weighing the egg, one can determine the proper RH value for a specific parrot at a certain climate, and adjust it accordingly in the incubator.

How to calculate an egg’s weight loss

Well-known researches indicate the ideal weight loss for an egg during the incubating process (between 18-28 days) is 15% (± 3%).

For example: A Grey African’s egg weighs 16 grams at the start of a 28 day incubation period.

The ideal weight loss during the whole incubation period would be 2.4 grams (16 grams X 15%). The weight loss during one day would be 0.0856 grams (2.4 grams divided by 28 days)

According to the calculation above, this Grey African’s egg should weigh 0.34 grams less after 4 days, meaning 15.65 grams (4 days X 0.0856 grams = 0.34 grams; 16 grams – 0.34 grams = 15.65 grams).

If the egg weight is as mentioned above, the relative humidity values inside the incubator are correct. If the egg weight is higher than 15.65 grams, the relative humidity percentages are too high and must be lowered. If the egg weight is lower than 15.65 grams, the weight loss is incorrect and the relative humidity percentages should be raised.

It is important to mention that the RH values are never constant during the incubation process – this a normal phenomenon. The breeder should attempt to maintain an average level of the desired RH value throughout the incubation process.

Some breeders incubate many eggs by using several incubators simultaneously, each with its own different RH values, transferring eggs between them according to the eggs’ need. The lost of weight should be measured using an accurate scale every 3-4 days. This procedure might seem a bit complicated at the first, however with a little experience a breeder can determine the proper RH values suitable to his different species, even without weighing the eggs.

The relative humidity values are different from incubator to incubator and depend on the incubator’s structure and air movement within. Therefor it is not possible to compare the RH values between different incubators.

If you are uncertain of the the proper RH value for your parrot during the beginning of the incubation process, try to set an average of 65% – 70% RH level for Rain Forest parrots, and 60% – 65% RH for those from dryer areas. However, the only way to determine the proper RH value is using the process described above. Setting the RH values without without calculating the eggs’ weight loss would be incorrect and irresponsible.

How to measure the relative humidity

As I have mentioned above, the presence of relative humidity in the incubator is an essential key for the incubation process and for successful hatching. Since humidity levels are relative and vary dynamically with changes of temperature, humidity measurements are problematic and should be measured according to the standard Temperature and Relative Humidity Charts showing the relative humidity in various temperatures.

Most of the standard humidity meters are designed to be used in a room temperature. These meters are inaccurate because a change in the room temperature causes them to display a wrong reading of the humidity level. A digital hygrometers might be housed in an attractive display, but those are generally inaccurate and one cannot determine if they deviations they display are significant or not. In addition there’s no certain way to determine whether a digital hygrometer displays incorrect humidity. Accurate digital hygrometers are very expensive and require periodic calibration. Several types of hygrometers exist for home use, but they are unsuitable for an incubator.

It is recommended to use an accurate Temperature / Humidity Measure, that is designed especially for incubators maintained at an average of 37.3°C and measures the relative humidity in percentages. The absence of such a humidity meter in today’s market drove us to come up with our own unique solution: the D.M.P temperature\humidity meter based on the wet\dry bulb principle.

The Professionals in Incubation

Tag Archives: Humidity Level

Does the embryo need help hatching?

Relative Humidity (RH) During the Incubation Process