peacock Archives - DOES GOD EXIST? TODAY

August 18, 2023August 17, 2023

Feathers – Complex Structures of Ingenuity

We take many things for granted without realizing the complexity of their design. That is undoubtedly true of bird feathers. American biologist Thor Hanson correctly wrote that feathers are “complex structures of ingenuity that defy the most advanced human technologies.”

Feathers are made of keratin, which is a protein. They are connected to blood vessels like our hair is connected to our vascular system. Once a feather reaches its final stage, it is disconnected from the blood vessel that has nourished it, reducing the weight of the feather. When molting occurs, and old feathers are discarded, the vascular system is re-connected by tiny muscles surrounding the feather follicles to grow a new feather.

These same muscles allow a bird to move its feathers for various purposes. Feathers serve the bird by providing insulation, waterproofing, color, display, and flight. Birds accomplish each of these functions in remarkable ways. Peacocks can present colorful displays, but so can parrots, pheasants, and various tropical birds.

Feathers provide insulation by trapping air, which is a poor conductor of heat. Down feathers trap air efficiently while adding very little weight to the bird. This same feature gives waterfowl their buoyancy while giving them insulation. Birds preen their feathers by treating them with oil from a gland just above the bird’s tail. The tight interlocking barbules in a bird’s outer feathers make them impenetrable to water. Birds use down to produce an environment that allows eggs to hatch and to keep chicks safe. Modern technology can’t match the heat-to-weight ratio of feathers.

Flight is possible because each wing feather has the shape of an airfoil to provide lift and minimize drag. Since the feathers are flexible, they can move to reduce drag, and their tips are designed to minimize turbulence making smooth flight possible. They really are complex structures of ingenuity.

Color in bird feathers is accomplished in several ways. For some feathers, melanin gives color to the feather’s keratin, and the structure of keratin is such that the bird’s diet can control its color. A flamingo’s pink color comes from eating algae that have carotenoids in it. Rather than using pigments, many brightly-colored bird feathers use structural color produced by manipulating light waves to create blues, greens, and iridescent colors.

Considering the complex structures of ingenuity we know as bird feathers brings to mind Psalms 9:1, “I will praise you, Lord, with all my heart; I will show forth all your marvelous works.” Feathers are among those marvelous works.

References: For more amazing information about feathers, see Thor Hanson’s book Feathers: The Evolution of a Natural Miracle, published by Basic Books © 2011, and Noah Stryker’s book The Thing With Feathers, published by Riverhead Books © 2014.

September 8, 2022September 7, 2022

Structural Color in Plants

When you see a peacock with brilliant green in its feathers, realize that it has no green feathers. Its feathers are actually brown, but God has used a clever optical trick to make them look green to us. We call it structural color. Likewise, many butterflies have bright blue spots on their wings, but there are no blue pigments in a butterfly’s wings.

Some plants produce fruits that look blue to us without having any blue pigment in the fruits. The only plants known to produce blue fruits in this way are Viburnum tinus and Lantana strigocamara. You will not get a blue stain if you crush their berries in your fingers. On the other hand, if you crush a common blueberry, its blue pigments will stain your fingers.

When you see a blue pigment, it is blue because it absorbs all other colors while reflecting blue. Structural color uses microscopic pyramid-like structures that manipulate the light. Since blue light has higher energy than other colors, it escapes the structure. Structural color requires no pigments, and you might call it an optical illusion.

Color is essential in the natural world. For example, animals with color vision use colors to camouflage, attract others, or discern whether something is good to eat. The problem with using pigments to produce color is that the chemistry to get a particular color is quite complex, but structural color does not involve any chemistry.

People have used chemicals to produce the colors we see in our fabrics, but some colors can be costly and time-consuming to produce. God has created a chemical-free method to produce much of the beauty we see in the world around us. Beauty in structural color gives evidence of a wise Creator.

Reference: National Science Foundation Research News

April 6, 2022April 4, 2022

Beauty in Nature

For the past two days, we have talked about beauty in nature and how it often seems to defy the evolutionary principle of survival of the fittest. Darwinists refer to “emergent order” as the process of living things coming into being without any design or intelligent guidance. Instead, they say it was accomplished by a set of simple rules laid out originally by Charles Darwin and refined into what is now known as Neo-Darwinism.

In his 1859 book On the Origin of Species, Darwin presented his principle of natural selection. However, he realized that natural selection acting on random mutations couldn’t explain the “selection” method used in all cases. Moreover, he was troubled by the excess beauty in nature. He saw unnecessary frills and flourish, which he could not explain by natural selection. A year after that book was published, his frustration caused him to write, “The sight of a feather in a peacock’s tail, whenever I gaze at it makes me sick.”

To cover those cases where natural selection can’t explain the beauty in nature, he introduced “sexual selection” in his 1871 book The Descent of Man, and Selection Related to Sex. Sexual selection involves the beauty often seen in male birds in general and peacocks in particular. According to Darwin’s sexual selection theory, the reason for the beauty of the peacock’s tail is that the peahens prefer such gaudy but impractical decorations. The same principle applies to many other species, such as bower birds or birds of paradise, where the males display striking colors or impressive actions to attract a mate.

German zoologist and eugenicist Ernst Haeckel was also an artist. He popularized Darwin through his artwork published in several books. His drawings depict the beauty he saw in even one-celled animals called Radiolaria, and he attributed the beauty to natural selection and mathematical principles. Haeckel was so enamored by Darwin’s hypothesis that he went out of his way to promote it in books of drawings.

Haeckel’s drawings sometimes showed his bias for Darwinism. For example, in The Natural History of Creation (published in German in 1868 and later in English), he displayed drawings that compared human embryos with embryos of various animals, suggesting that the development of those embryos repeats the path of evolution. However, he manipulated his illustrations to prove his point. Other scientists later pointed out the flaws, and his dishonesty discredited his scientific credentials.

However, the books of Haeckel’s drawings were best sellers in their day, and they are still selling even today. Nevertheless, those drawings did not prove design without a designer. We have called the question of how excessive beauty in nature could have evolved by natural selection “the problem of beauty.” Yesterday, we said that we prefer to call it the blessing of beauty—a blessing from God. However, atheists do not see it as a gift from the Creator, and they try to explain it away as accidental. They suggest that what appears to be designed for a purpose has no purpose and no designer. We will look at that tomorrow.

October 12, 2020October 11, 2020

Relationship Between Fruits and Birds

There is an essential relationship between fruits and birds. We all know that birds eat fruits, but we may not be aware of the system’s complexity and how it varies from place to place.

Here in Michigan, we struggle with poison ivy, and I am very sensitive to it. When I moved into my present house, the property was covered with a great deal of poison ivy. I spent most of our first summer eradicating it. The following spring, I found new poison ivy plants coming up in places where there were none the year before. One of my biology teacher friends informed me that birds eat the berries of poison ivy, and they plant many of the seeds resulting in a new crop. That makes it hard to eradicate.

An August 17, 2020, report by the National Science Foundation told about a study of an evergreen shrub found in the U.K. and most of Europe. This plant, called Viburnum tinus, stores fat in the cells of its fruit, making it an ideal food for birds’ survival success. The fruit also contains a large number of seeds. The fat, or lipids, in the fruit’s cells, give it structural color, making it a very bright blue. Structural color is not made from pigments, but it is produced by internal cell structures interacting with light. The feathers of many birds, including peacocks, and the wings of butterflies have structural color, but it is very rare in plants.

Miranda Sinnot-Armstrong of Yale University says that they used electron microscopy to study the Viburnum tinus fruits’ cell walls. She said they “found a structure unlike anything we’d ever seen before: layer after layer of small lipid droplets.” Because of the lipids, these plants supply the fats that birds need. Their shiny metallic color signals the birds to lead them to this nutritive source.

The more we study the natural world around us, the more we see incredibly complex structures to allow life to exist. This is not an accident but a complex set of systems to provide diversity in the natural world. The relationship between fruits and birds is designed to give the birds a way to find nourishment and to support their food sources in a symbiotic relationship. It’s another example of God’s design for life.

June 20, 2018June 12, 2018

Beauty in Structural Color

Beauty in Structural Color on a Peacock
Some of the most beautiful colors you will see are found in birds and butterflies. We usually think of color as coming from pigments or dyes which reflect specific colors of light. However, the most intense and beautiful colors in the feathers of birds and the wings of butterflies don’t come from pigments. These animals display beauty in structural color.

Microscopic structures create structural color within the bird’s feathers or the butterfly’s wings which interfere with the frequencies of visible light. For example, the pigment in a peacock’s feathers is brown, but when you look at a peacock, you see blue, green, and turquoise in unusual patterns. Structural color can create color effects more intense than pigments, and structural color doesn’t fade like pigments. Structural color can even create an effect called iridescence in which colors change depending on the viewing angle. You can see this effect when you look at a CD or DVD.

What is the purpose of the colors in birds? The purpose may be for camouflage, to attract mates, or to indicate dominance. But in many cases, the colors seem to give no advantage. The beautiful colors merely exist for the beauty. When there is no evolutionary advantage for the colors, how did they get there? We humans appreciate beauty and enjoy looking at the beautiful colors. Could it be that colorful birds and butterflies were created by a Designer who is an artist who loves beauty, and who created us in His image. Could it be possible that God created the beauty in structural color for us to enjoy?
–Roland Earnst © 2018