Mallard Ducks

The most popular and well-known duck is probably the Mallard. They can be found just about anywhere in the world. Mallards are so common that when most think of a duck, they imagine a Mallard.

The Mallard is the origin of all domestic duck breeds other than the Muscovy. According to Charles Darwin, of all wild ducks, only the male Mallard has the distinctive curl in the tail feathers. As all male domestic ducks have these curly feathers, he came to the conclusion that all domestic breeds originated from the Mallard. From the big, meaty Pekin to the skinny, upright Runner duck - their ancestor is the Mallard breed.

They are a very popular hunting bird as they are so abundant throughout the US. Their meat is considered very flavorful.

They can lay between 60 to 120 eggs a year on a farm. In the wild they will lay 10-15 eggs in a nest. If their first brood is raised early or their nest is destroyed, they can lay a second set of eggs. Compared to domestic breeds their egg production is low, but their fertility is one of the best we have - about 90%.

Mallards are beautiful birds. Females are a speckled brown, but the males sport striking green heads, a white collar around the neck, gray on the belly, and cinnamon chests when they are adults. However, until males start to get their colorful feathers at 12 weeks of age, they are the same coloring as the females. By 16 weeks the males are fully feathered and retain these colors until the end of the breeding season when they molt into more drab, less brightly colored feathers. After 3-4 months, their beautiful feathers grow back and these are retained until their molt the next summer.

Today, the Mallard is considered an invasive wild species in some areas as it is able to mate with other indigenous ducks thereby producing new hybrids and eventually diluting the pure native breed until purebreds are rare. Wildlife authorities in both Hawaii and Florida do not allow the importation of Mallards in fear of them hybridizing their native duck population. In Hawaii, the native duck is the Koloa duck which is on the endangered list, and in Florida it is the Mottled duck.

The vast majority of wild Mallards migrate. In the summer they can be found in the northern parts of the US and all of Canada. When fall arrives and food becomes scarce, they fly south to more temperate climates such as the southern US and parts of Mexico. Come spring, they again return to their nesting grounds.

This migration pattern can be divided in to four different flyways or flight paths: Pacific, Central, Mississippi, and Atlantic Flyways. Scientists believe they use a combination of polarized light, stars, and landmarks to find their way during migration. Nature’s own GPS!

There are, of course, exceptions. There are plenty of areas that do not have a winter - where the water does not freeze over and there are enough food resources year round. In these areas many Mallards decide to take up year round residence. This includes Hawaii’s Koloa and Florida’s Mottled ducks which are both categorized as non-migratory.

If you release Mallards that have not been hatched and grown in the wild, it is highly unlikely they will migrate. Studies show they go no further than five miles from where they were released. Though your released birds may fly away, the Mallard’s ability to fly and escape predators makes them much more likely to survive than any domestic ducks released into ponds and streams. If, however, you do not want your Mallards to fly, you can trim their wing feathers as show in our feather trimming blog post.

Mallards are beautiful birds. Enjoy them in your pen, barnyard, garden or pond.

Breed	Temperament	Weight	Egg Production	Mothering	Bluish Eggs	Egg Size
Mallard	Calm	2.25-2.5 pounds	60-120/year	Very Good	70%	65-75 grams
Fertility	APA Class	Foraging Ability	Conservation Status	Our Show Quality	Flying Ability	Origin
90%	Bantam	Very Good	Abundant	Too "Chunky"	Very Good	Native to North America

Are my eggs fertile?

A common question that we get is if the eggs, whether they are the eggs they receive from us, eggs their own ducks are laying, or eggs they find out in the wild, are fertile. The simple answer is that we do not know.

One way to find out if your egg is fertile is to crack it open. While this does prevent you from incubating the egg, it does tell you if an egg is fertile. Maybe you just wanted to check to make sure your single male was fertile. It is also a great way to check fertility if you are eating some of your eggs. If you look closely at the yolk and see a white doughnut shaped spot, then the egg was fertile. If the white spot was solid and irregularly shaped, then it was infertile.

Fertile egg

Infertile egg

The only way to find out if your egg is fertile without cracking it open is to incubate and then candle the egg. This normally takes about six days before you can clearly see development in the egg. You can use our candling photos on our website to track the development of your eggs.

If you do not see development after six days, we suggest you continue incubating as it could be that your flashlight is not strong enough (see our candling page for explanation). If you don’t see anything by ten days, then you know for sure your eggs were either infertile or died very early in development.

We guarantee that 80% of our eggs will be fertile and alive at first candling. This does not mean that we guarantee 80% hatch as there is also a spike in mortality the two days before hatching.The most common times for the embryo to die are the first several days of incubation and the last several days before hatching. So an egg that died early in incubation was truly fertile as it started to grow, but oftentimes these early deaths and truly infertile eggs are called “infertile”. This early death can be caused by many things and is typically caused by incubator conditions - over which we have no control.  

The Power of Science

In the future, there is a possibility of identifying fertile eggs without breaking them open or incubating them. Several research teams have been developing processes to determine the fertility and even the sex of an egg without cracking it and before it goes into an incubator. Egg Farmers of Ontario in concert with Michael Ngadi from McGill University have found a way to determine fertility and sex of an egg using various light waves and are working to make it commercially available to hatcheries. At the same time, Vital Farms in the USA and Novatrans in Israel are looking to put their invention into commercial production which uses the gases exuded from an egg to determine fertility and sex.

This is exciting for large commercial hatcheries producing laying chicks as they do not have a market for the male chicks and currently put down the excess males after hatching. If they can determine the sex before incubation, the male eggs could be sold for consumption. Likewise, infertile eggs could be sold for consumption and money would not be spent on labor and equipment to incubate infertile eggs that have no chance of hatching. These processes should be available to large hatcheries within several years, but when this technology filters down to us and hobby hatcheries

is anyone’s guess. So until that happens you have to do what has been done for the past century - break the egg or incubate it to determine if it is fertile.