Ever caught yourself utterly captivated by the sight of a tiny bird breaking free from its shell and wondered, how in the world does that happen? Youre definitely not alone in your curiosity.
Fun fact: birds reproduce through a fascinating method called internal fertilization. In this comprehensive guide to avian reproduction, well dive deep into the intricate details of how bird eggs are fertilized.
Early stages of embryo development within the egg
Exciting things are happening in the egg during the early stages of embryo development! After fertilization, the sperm nucleus combines with the ovum’s (or egg cell’s) nucleus.
This fusion creates a single-celled zygote. As time passes, a process known as cleavage causes this zygote to divide and grow into more cells. These new cells create layers in the embryo, such as an inner layer that develops into organs and an outer layer that eventually becomes feathers and skin.
Its incredible how life starts from just one tiny cell!
Make these cakes spiced with hot sauce and herbs along with the crema, ahead of time and then all you have to do is fry some eggs when your guests are over for brunch. Get our Black Bean Cakes with Fried Eggs and Avocado Crema recipe.
Nutritionally, says Cobey, fertilized and unfertilized eggs are the same. They also taste the same, says Kathy Shea Mormino in her Facts & Myths About Fertile Eggs article on her blog, The Chicken Chick. Mormino is an attorney as well as a backyard-chicken keeper, advocate, and educator whos appeared in The Wall Street Journal, Associated Press and on local and national TV, radio, and podcasts.
This recipe is inspired by a recipe in My Paris Kitchen by David Lebovitz. Do you need much more than that? Get our Baked Eggs with Kale, Portobellos, and Feta recipe.
When fertilized eggs are sold for consumption, there is no danger of eating a developing embryo, says Cobey, for a few reasons: All eggs sold in the United States as food must be refrigerated, a process that halts any growth inside the shell. Also, the interior of any egg intended to be sold as food must be inspectedaccomplished by shining a bright light through the shell (called candling)which highlights any irregularities, such as a developing chick. These regulations hold true whether the eggs are intended for a large chain like Safeway or for the farmers market. Eggs with irregularities never make it to retail and are destroyed (except for that one time).
Favas get the treatment they deserve in this dish that requires you to shell them and cook the creamy beans along with fingerling potatoes and mushrooms. Get our Warm Fava Bean Salad recipe.
Parental care during incubation
In order to keep the eggs warm during incubation, the male and female birds alternately sit on them. They accomplish this by controlling the temperature of the eggs with their body heat.
The parent bird will continually reposition itself and fluff its feathers to guarantee that the egg is heated evenly throughout. They also defend the nest from intruders and predators during this time.
The development of the embryos inside the eggs depends on these parents’ nurturing.
The time comes for the egg to hatch and bring a new life into the world after weeks of incubation.
There are telltale signs that indicate a bird is ready to hatch. Inside the egg, the chick begins to move and wiggle its body. It may even produce tiny noises known as “pips” while it attempts to crack the shell.
The chick cracks open the shell with the help of a unique instrument on its beak known as a “egg tooth.” This process is called pipping. The chick takes some time to fully emerge from the egg, but once it does, you should avoid handling or disturbing it right away.
Until the baby is old enough to leave the nest, its parents will tend to it, keeping it warm and secure.
FAQ
How do you know if a bird egg is fertilized?
What birds lay eggs without fertilization?
Why do some birds lay unfertilized eggs?
Do bird eggs have to be fertilized?