How Big Are Hummingbird Eggs? Their Tiny Size Explained

Hummingbirds are the smallest birds on Earth, so it’s no surprise their eggs are tiny as well. But just how small are hummingbird eggs compared to other species? These delicate jewels of nature precisely nourish growing hummingbirds in the nest.

If you’re short on time, here’s a quick answer to your question: The average hummingbird egg is about the size of a jellybean, measuring 0.5 inches long and 0.3 inches wide. That’s smaller than a penny!

In this in-depth article, we’ll look closely at hummingbird egg sizes. You’ll learn how their diminutive size compares to other birds’ eggs and why being so petite is important. We’ll also explore how the female builds a nest to accommodate such small eggs, and how the chick develops inside its Lilliputian shell.

Typical Hummingbird Egg Size and Shape

Hummingbird eggs are incredibly small and delicate, reflecting the tiny size of these remarkable birds. Their size can vary slightly depending on the species, but on average, hummingbird eggs measure around 0.5 to 0.8 inches in length. They are about the size of a jellybean or a small grape.

Despite their small size, these eggs pack a powerful punch, as they contain all the necessary nutrients and genetic information to develop into a fully grown hummingbird.


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Length and width dimensions

Hummingbird eggs are usually oval-shaped, with one end slightly more pointed than the other. The length of the eggs can range from 0.5 to 0.8 inches, while the width is typically around 0.3 to 0.5 inches.

This compact size allows the eggs to fit snugly in the hummingbird’s nest, which is typically built in a tree or shrub, using materials like moss, plant fibers, and spider silk.

Comparison with coins

To put the size of hummingbird eggs into perspective, imagine a hummingbird egg being roughly the same length as a quarter or a nickel. It’s amazing to think that such a tiny creature can produce eggs that are so small.

In fact, if you were to hold a hummingbird egg in your hand, you might need to be careful not to accidentally crush it due to its delicate nature.


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Shape and surface texture

The shape of hummingbird eggs is generally elongated, resembling a small football or an oval-shaped capsule. This shape allows the eggs to have a greater surface area, which helps with efficient gas exchange during the incubation process.

Additionally, the surface of the eggs may have a smooth texture, allowing the mother hummingbird to easily turn and rearrange them while she sits on the nest to keep them warm.

It’s fascinating to marvel at the intricate details of hummingbird eggs, despite their petite size. Their unique characteristics play a crucial role in ensuring the successful development of the next generation of these incredible birds.

How Hummingbird Eggs Compare to Other Species

Hummingbirds are known for their small size and agility, and their eggs are no exception. These tiny birds lay equally tiny eggs, which are among the smallest in the bird kingdom. Let’s take a closer look at how hummingbird eggs compare to those of other species.


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Relative to bird egg size spectrum

When it comes to the size of bird eggs, there is a wide spectrum. On one end, we have the eggs of large birds like ostriches and emus, which can weigh several pounds and are equivalent to dozens of chicken eggs. On the other end, we have the eggs of small songbirds and hummingbirds.

Hummingbird eggs are so small that they often get overlooked due to their diminutive size.

Larger eggs of chickens, ostriches

In comparison to the larger eggs of chickens and ostriches, hummingbird eggs are incredibly tiny. While a chicken egg can weigh around 50 grams and measure about 2.5 inches in length, a hummingbird egg weighs only a fraction of a gram and measures less than an inch in length.

In fact, you could fit several hummingbird eggs inside a single chicken egg!

Other small bird eggs like finches

Even when compared to other small bird species, such as finches, hummingbird eggs still stand out for their small size. Finches, which are known for their colorful plumage and melodious songs, lay eggs that are larger than hummingbird eggs but are still relatively small in size.

While finch eggs can vary in size depending on the species, they are generally larger than hummingbird eggs but smaller than chicken eggs.

It’s truly remarkable how nature has managed to adapt and diversify the size of eggs to suit the needs of different bird species. From the large eggs of ostriches to the tiny eggs of hummingbirds, each species has evolved to ensure the survival of their offspring in their respective environments.

Why Hummingbird Eggs Are So Small

Hummingbirds, known for their incredible agility and fast wingbeats, are some of the smallest birds in the world. It comes as no surprise then, that their eggs are also incredibly tiny. Here are a few reasons why hummingbird eggs are so small:

Weight limitations for flight

Hummingbirds have evolved to be masters of flight, capable of hovering in mid-air and flying backwards. However, their small size comes with some limitations. To remain agile and maintain their extraordinary flight capabilities, hummingbirds cannot afford to carry excess weight.

Therefore, their eggs have adapted to be lightweight and small, allowing the mother bird to carry them effortlessly while flying.

Fit inside tiny nests

Hummingbirds build intricate nests using materials like plant fibers, lichens, and spider silk. These nests are usually quite small, often resembling thimbles or cups, and are nestled in secure locations such as the branches of trees or shrubs.

The small size of the eggs ensures that they fit comfortably inside these tiny nests, providing enough space for the mother bird to incubate them while protecting them from predators and the elements.

Fewer eggs to incubate

Another reason for the small size of hummingbird eggs is that hummingbirds typically lay fewer eggs compared to other bird species. While some birds may lay a dozen or more eggs in a single clutch, hummingbirds usually lay only one or two eggs at a time.

By laying fewer eggs, hummingbirds can dedicate their energy and resources to ensure the survival of each individual offspring. The small size of the eggs allows the mother bird to provide ample warmth and nourishment during the incubation period.

Building a Nest for Miniature Eggs

Hummingbird eggs are incredibly small, often measuring around 0.5 inches in length. Despite their tiny size, these eggs require a carefully constructed nest for protection and incubation. Let’s explore how hummingbirds build nests to accommodate their miniature eggs.

Nest size and materials

Hummingbird nests are marvels of engineering, considering their small size. They are typically about the size of a golf ball, with an average diameter of 1.5 inches. These nests are constructed using a variety of materials, including plant fibers, spider webs, and lichens.

The spider webs help bind the nest together, providing strength and flexibility.

Hummingbirds often build their nests on tree branches or even clotheslines, using the surrounding vegetation for camouflage and support. The nests are compact and cup-shaped, providing a cozy space for the tiny eggs to rest.

Protection from elements

Hummingbird nests are not only built to accommodate the size of the eggs, but also to protect them from the elements. The carefully woven structure helps shield the eggs from rain and wind. The outer layer of the nest is often made of soft plant fibers, providing insulation and keeping the eggs warm in cooler temperatures.

The nest’s location also plays a crucial role in protecting the eggs. Hummingbirds strategically choose locations that offer some natural cover, such as dense foliage or overhanging branches. This helps protect the eggs from direct sunlight and predator attacks.

Camouflage from predators

Despite their small size, hummingbird eggs are vulnerable to predators such as squirrels, snakes, and other birds. To minimize the risk of predation, hummingbirds go to great lengths to camouflage their nests.

The use of lichens and moss in the nest construction helps the nests blend in seamlessly with their surroundings. The colors and textures of these materials mimic the appearance of tree bark or mossy branches, making it difficult for predators to spot the nests.

Additionally, hummingbirds often choose nesting sites that are well-hidden and provide natural cover. This further enhances the chances of their nests going unnoticed by potential predators.

Building a nest for tiny hummingbird eggs requires careful attention to detail. From nest size and materials to protection from the elements and camouflage from predators, hummingbirds display remarkable adaptability and resourcefulness in ensuring the survival of their offspring.

Developing Inside a Teacup-Sized Egg

Hummingbirds, known for their vibrant colors and remarkable flight capabilities, start their lives as tiny, delicate creatures. Their eggs, no larger than a coffee bean or a jellybean, are some of the smallest eggs laid by any bird species.

These teacup-sized eggs hold the key to the future generation of these fascinating creatures.

Nutrients in egg white and yolk

Despite their small size, hummingbird eggs contain all the essential nutrients required for the development of the growing embryo. The egg white, or albumen, provides the necessary proteins, while the yolk supplies fats and other nutrients.

This nutrient-rich composition ensures that the hummingbird embryo has everything it needs to grow and thrive, even in such a compact space.

Less room to grow than other birds

Compared to other bird species, hummingbirds face unique challenges due to the limited space within their eggs. While larger bird eggs have more room for the embryo to grow, hummingbird eggs have less space, making the development process more challenging.

However, nature has equipped these tiny creatures with adaptations that allow them to overcome these obstacles and successfully hatch.

Hatching challenges

Once the hummingbird embryo has developed and is ready to hatch, it faces another set of challenges. The small size of the eggs means that the hatchlings must be incredibly small and agile in order to break through the shell.

Hummingbird chicks use their specialized beaks to crack open the eggshell and make their way into the world.

It is truly amazing to think about the journey that these tiny hummingbird eggs go through. Despite their size, these eggs contain all the necessary nutrients for the embryo to develop, and the hatchlings are equipped with the tools they need to break free from their small shells.

The next time you spot a hummingbird in your garden, take a moment to appreciate the incredible journey they have made, starting from their teacup-sized eggs.


The pea-sized eggs of hummingbirds are marvels of nature, meeting the needs of the world’s smallest avian species. Their diminutive size allows hummingbirds to successfully reproduce and continue delighting us with their aerial acrobatics.

These minute eggs remind us that some of nature’s most amazing structures can come in very small packages. The tiny hummingbird chick growing inside has everything it needs to hatch into the dazzling jewel we know and love.

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