A Diversity of Eggs

Delightful gifts that a hen gives the family caring for them are delicious eggs with shells of varied sizes, hues, and shapes. Some are speckled. Most are solid color. These gorgeous gems soon transition into tasty and nutritious food.

Many flock owners keep several chicken breeds that lay a diversity of shell colors ranging from light to dark brown, blue/green, white, and virtually every shade in between. Some shells are smooth and glossy, while others are more textured. When arranged in an egg carton they are a delight to the eye and a striking contrast to the sameness of supermarket eggs.

Many wonder why eggs are so diverse. The answer is simple. Chickens are genetically complex.  They have between 20,000 and 23,000 genes in about one billion DNA base pairs. This compares with the 20,000-25,000 human genes in 2.8 billion DNA base pairs.  Enormous genetic complexity results in much individual variation.  Just as people come in many shapes, sizes, and colors because of genetic diversity, so do chickens.  This explains why chickens range in size from the tiny Serama bantam breed to immense Jersey Giants.  Chicken feathers come in dozens of color shades and marking patterns.

Chicken breeds were developed over centuries by human selection for certain traits, like egg production, shell color, fast growth, pleasant demeanor, and attractive feathers. As a rule breeds developed around the Mediterranean Sea, such as Leghorns and Anconas, are relatively small in body size, are nervous and active, and lay many white shelled eggs. Some more northern European breeds, like Hamburgs, also lay white eggs. In contrast, most breeds developed in England, the United States, and Australia are large bodied and lay brown shelled eggs. Marans, a French breed, lays exceptionally dark shelled brown eggs.  Araucanas from South America are oddballs that lay eggs with shells ranging from greenish to blueish.  No matter how diverse chickens are, they are all of the same species.

When breeds are crossbred, egg shell color is usually (but not always) a blend of what the parent breed lays. Genetics get complicated but modern poultry breeds generally understand the key to traits and have created hybrid broilers that grow astonishingly fast and also hyper laying strains.

Eggs of all birds are amazing far beyond their color. Shape varies with species and within a species. Generally, wild birds that make sparse nests on rocky cliffs lay pointy, oblong eggs that roll in a circle, keeping them in the nest. Birds that nest in tree cavities, where it’s impossible for eggs to roll out, tend to lay more round eggs.  Chickens fall somewhere in between.  In the wild they nest on the ground, so eggs are mildly asymmetric, although some are nearly round.  Usually during laying, the blunt end emerges from the hen’s body first, followed by the tapered skinny end.

Individual hens usually lay similar eggs that may vary in shape from another hen of the same breed. For example, a Barred Rock hen in a small flock may lay eggs that are unusually round while another Barred Rock may lay much more oblong ones.  Each will continue laying eggs of that shape throughout her life.  One hen may also lay darker brown eggs than a sister of the same breed, and this characteristic will persist through her life. Generally, brown eggs get somewhat lighter in shell color as a hen ages.

According to Pat Leonard, who wrote an extensive article on egg color for the Summer 2017 issue of Living Bird magazine, egg pigments are complex molecules synthesized in the shell glad.  A pigment called protoporphyrin produces reddish-brown colors while biliverdin produces blue and green shades. Varied amounts of each explains the intensity of shell color and when pigments are absent the shell is white.

The article lists several other interesting egg facts. For example, eggshells can have from a few hundred to tens of thousands of pores and eggs that hatch into chicks able to walk and feed shortly after hatching, like chickens, have larger yolks than species that hatch naked and helpless, like baby robins.

People who tend small flocks enjoy the delightful diversity of eggs of many shapes, sizes, and hues. A carton full is a delight to the eye.

The Scoop on Rhode Island Red Chickens

Looking to add crazy-good egg production to your flock? Then Rhode Island Reds are the gals you’ve been searching for! This breed produces large, brown eggs, with roughly 260 eggs produced annually! With all of these great attributes, this popular breed is sure to keep your coop happy.

What’s the best breed for your space?

Almost anyone with experience rearing small flocks of chickens in suburban backyards will recommend sticking to larger breeds that lay brown eggs. These breeds tend to be calm and gentle. Large breeds are  easy to care for and their tendency toward quietness is appreciated by nearby neighbors. 

It is important to consider your space when choosing breeds for your flock.
It is important to consider your space when choosing breeds for your flock.

Although brown eggs hold no nutritional edge over their white counterpart, most backyard flock owners prefer darker ones that are harder to find and more expensive at the grocery store.

However, smaller, lighter breeds can be ideal where houses are spaced further apart and noise isn’t an issue, but predators are. Folks living on farms or acreages often let their birds roam the yard and nearby fields without confinement. Unfortunately, big spaces are also a habitat preferred by coyotes, foxes, raccoons, hawks, and free ranging dogs.       

The traits that make the smaller white-egg chicken breeds less than desirable in town render them ideal on acreages.   Brown leghorns, anconas, minorcas, and a host of other white egg layers are amazingly quick, elusive, and vocal.   Many fly as well as a wild pheasant, making them hard to catch by both humans or predators.

Chickens have amazingly keen eyesight and should a flighty leghorn spot danger it will squawk loudly, putting all its flock mates into evasive action. If a fox tries to snatch a bird, it’s likely to fly to the horizon or the top of a nearby tree.  In a similar situation a heavier breed like a barred rock or Orpington would likely become fox food.

Raising fast light breeds on large acreages poses challenges not shared by confined larger breeds. Despite their agility and speed, expect predators to catch a bird now and then. 

Smaller breeds often are outstanding egg layers, but they like to hide their clutch in unlikely places outdoors. Not all the eggs will be in the coop’s nest, and egg hunting may be necessary. The white leghorn is the most prolific layer on record and chances are if you’ve ever bought white eggs from a grocery store, they came from this type of bird.

Dozens of light breed chicks can be purchased from hatcheries, and they sport a diversity of feather patterns and colors. Some are among the most beautiful of chickens. Although heavy brown-egg breeds are best for suburbia, lighter breeds have their place in spacious yards.