This article was automatically translated from the original Turkish version.
Birds are beings that, by their very creation, possess the ability to fly, distinguishing them from other vertebrates through this unique characteristic. This ability granted to them depends not only on their physical structure but also on their capacity to utilize aerodynamic principles to control their movement through the air. When flapping their wings and directing their bodies, birds harness the four fundamental forces that also form the basis of aircraft design: thrust, lift, drag and weight. The delicate balance among these forces enables birds to glide through the air and cover long distances by controlling their direction. The flight of birds is regarded as a miracle that reveals both the subtle order of nature and the power of the Almighty Allah in creation. Each wingbeat is not merely a physical motion but a tangible manifestation of divine wisdom; this ability of birds serves as a reminder of the flawless design of creation.
Eastern Silver Gull (pixabay)
The body structure of birds has been finely crafted to minimize air resistance during flight. Light, dense feathers covering the body and oriented backward reduce friction, allowing birds to glide more easily through the air. The wings are composed of long feathers arranged in a tail-fan shape; this structure maintains balance and enhances maneuverability. The breastbone, or sternum, of birds is significantly broader than that of non-flying vertebrates; this broad structure provides attachment points for powerful flight muscles. These muscles generate effective thrust through wingbeats, enabling the bird to glide through the sky.
To enable flight, the body weight of birds is kept extremely low; this is a fundamental adaptation that allows them to glide and cover long distances. Bird bones are thin and hollow, providing both lightness and necessary strength. In place of heavy teeth, birds possess lightweight beaks, which help maintain an optimal center of gravity and improve energy efficiency during flight. While gliding, birds balance drag force with the thrust generated by wingbeats; at the same time, the force of weight is counteracted by lift generated from the pressure difference between the upper and lower surfaces of the wings. This magnificent and flawless balance is not merely a physical structure but also a sign of the precise calculation and wisdom in Allah’s creation; each wingbeat is a miracle that reveals the power of the Creator and the order in nature.
A Flying Eagle (pixabay)
One of the most fundamental forces enabling birds to glide in the air is lift. This force arises because air moving over the upper surface of the wing travels faster than air moving beneath it. These differing airspeeds create a pressure difference in accordance with the Bernoulli principle: pressure is lower above the wing and higher below it. This pressure differential lifts the bird’s body upward, allowing it to remain airborne.
Penguins Jumping into Cold Waters Near or in Antarctica (Pixabay)
Not all bird species possess the ability to fly. For example, species such as the ostrich and penguin cannot generate sufficient lift and thrust because their wings are too short relative to their body size. Moreover, in these species, the structures attached to the sternum that support flight muscles are either greatly reduced or entirely absent. As a result, they cannot balance their weight through powerful wingbeats. Similarly, species such as the kakapo (night parrot), kiwi and rhea also exhibit comparable anatomical limitations and are flightless. The wings of penguins, however, have evolved entirely into flipper-like structures adapted for swimming underwater.
A Rhea with Its Chick (pixabay)
The primary reasons are anatomical and physiological. Flightless birds generally cannot generate the necessary lift and thrust due to their excessive body weight, short or insufficiently sized wings, and weak or absent flight muscles attached to the sternum. Additionally, in some species, feather structure and aerodynamic compatibility are inadequate for flight. In summary, these birds lack the physical and muscular structure required for flight and therefore cannot become airborne.
A Gentle Kakapo (Night Parrot) (pixabay)
The ability of birds to fly depends not only on knowledge of aerodynamic principles but also on the flawless integration of specialized anatomical adaptations. A lightweight skeletal structure, the arrangement of feathers, powerful muscular and bony systems, and the balance of aerodynamic forces together enable birds to glide freely through the sky. Flightless birds serve as examples of the diversity in creation and divine wisdom; each species is a unique design reflecting the power of Allah. Thus, just as the miracle of birds gliding through the sky reveals the artistry of the Creator, so too do the distinct abilities of flightless birds demonstrate the variety and wisdom in Allah’s craftsmanship.
A Cute Kiwi Bird (pixabay)
When you look at the sky, you can perceive that every bird reflects the art and wisdom of Allah. From small, agile birds to those that migrate over vast distances; from predatory birds diving at high speeds to shorebirds—each one demonstrates the power of the Creator in His creation.
In the Kur’an, birds are mentioned as signs of Allah’s power and the order He has established. As you observe their flight, reflect not only on the biological mechanisms but also on the system sustained by Allah’s mercy and wisdom. Each wingbeat in the open sky is a miracle that reminds us of the existence and greatness of the Creator.
I conclude this article with the following verse:
In the name of Allah, the Most Gracious, the Most Merciful
"Do they not see the birds held aloft in the expanse of the sky? None holds them up except Allah. Indeed, in this are signs for a people who believe." Surah An-Nahl, Verse 79【1】
Almighty Allah (cc) has spoken the truth.
[1]
Aerodynamic Adaptations
Lightness and Skeletal Structure
Formation of Lift Force
Are There Flightless Birds?
Why Can’t These Birds Fly?
The Art and Power of the Almighty Allah