Flightless Birds: Stories of Birds That Cannot Fly

 

Just as the word *dhenki* (traditional husking pedal) immediately brings to mind the image of husking paddy, the word ‘bird’ instantly evokes the freedom of soaring through the sky with outstretched wings. If one were asked, “If you were a bird, what would you do?” the instinctive reply would be, “I would spread my wings and fly across the sky whenever I pleased.” Of course, if someone’s desire happens to be feeding on insects like a bird, I certainly wouldn't object! A significant part of our childhood was spent trying to unravel the mysteries of these birds soaring overhead. We used to ask our mothers, “How do birds fly?” This single question has intrigued us for ages. Eventually, envious of the bird's freedom of flight, humans began attempting to fly themselves.


The subsequent history is more or less familiar to us. However, that history is not the focus of our discussion today; nor are we concerned with the general ability of birds to fly. Instead, our discussion will center on birds that cannot fly. Just as the sight of magpie-robins, mynas, and crows in the sky has amazed us with the marvel of avian flight, flightless birds like ducks and chickens have also intrigued us. It is worth noting, however, that chickens and ducks can fly short distances. Yet, there exist certain birds that are completely incapable of flight. To compensate for this inability, they have adopted a variety of unique evolutionary adaptations.


Bird bones are largely hollow and air-filled; this characteristic enables them to take to the skies. The ability to fly is a crucial trait for birds. There is simply no substitute for flight when it comes to escaping fierce predators, migrating in response to changing weather conditions, or traveling to new areas in search of food. Flying is far more convenient than traversing long distances on foot. Birds take to the skies to meet these very needs.


While the ability to fly is essential for birds, it demands a tremendous amount of energy. Consequently, birds capable of flight tend to have smaller body sizes. However, flightless birds store this energy in their bodies and utilize it to survive on land. Many of the approximately 60 species of flightless birds found across the globe have managed to survive in hostile environments despite food scarcity. The list of flightless birds includes penguins, ostriches, emus, wekas, cassowaries, steamer ducks, rheas, grebes, and others.

 How did flightless birds emerge?

If birds have no need to fly, they simply won't. Scientists believe that the journey toward flightlessness began with exactly this kind of scenario. Let’s consider a hypothetical bird named 'X'. Bird X lives in a region free from predators and with an abundant food supply. Consequently, it reduced its flying activity. Over several generations, these birds stopped flying altogether, fostering a tendency toward reduced flight. Through hundreds of thousands of years of evolution, the hollow bones of Bird X became denser; light feathers were replaced by heavier ones, and their wings narrowed—sometimes to the point where the wing bones disappeared entirely. The descendants that emerged were vastly different from their flight-capable ancestors of generations past.

Evolutionary biologists believe that many birds lost the ability to fly after settling on safe islands. If an island lacks predators and boasts a stable climate, birds can spend generation after generation in the same location. However, the origins of these birds vary. Flightless birds tend to have heavier bodies and can often grow quite large. Take the ostrich, the world's largest bird, for example; it can reach an average height of about 2.8 meters, with males weighing around 120 kilograms. Such a heavy body makes flight impossible for these evolved birds. Examining the characteristics of specific flightless birds provides a clearer understanding of this group.

Penguin

Our list begins with the penguin, a flightless, swimming bird that inhabits the frigid environment of Antarctica. There are approximately 18 species of penguins, none of which can fly. However, they possess wings that serve as highly effective tools for swimming; indeed, penguins spend a significant portion of their lives in the water.

In addition to Antarctica, they also inhabit the region of the Galápagos Islands. They stand only about 4 feet tall. Moving about gracefully on slender, small legs, they rely on fish, krill, and squid for sustenance.

Ostrich

The powerful ostrich is considered the leader of all birds, not merely because it is flightless. Its size and weight have already been discussed. This massive bird also lays the world's largest eggs (measuring 5 inches in diameter and weighing 3 pounds). For these flightless birds, their legs serve as their primary defense; using these strong legs, they can run at high speeds—reaching up to approximately 73 kilometers per hour. When confronted by a threat, they can strike using their legs.

 Ostriches primarily inhabit Africa, where they thrive in open landscapes. Small populations are also found in certain regions of southern Australia.

Cassowaries

Cassowaries are rather feisty birds; native to the Papua New Guinea region, they are notorious for their aggressive behavior. Although flightless, they delight in startling other birds. They launch swift attacks against predators and enemies while letting out harsh, raucous cries. Their secret weapon is a sharp, four-inch-long claw capable of killing large animals—and even humans.

These formidable birds are omnivores, sustaining themselves on a diet of fruits, foliage, and insects. In terms of size and weight, they rank second only to the ostrich. They roam the land with an air of dominance; after all, if one can reign supreme on the ground, why bother flying through the sky?

Kiwi

The kiwi comprises a group of five distinct species. These plump, endearing birds are native to New Zealand—so much so that the locals themselves are affectionately known as "Kiwis." They possess vestigial wings covered in soft, hair-like plumage, and their nostrils are located at the very tip of their slender beaks.

Kiwis have become a major attraction for tourists, largely due to their adorable appearance. While the egg itself is relatively small, the kiwi holds the world record for laying the largest egg in proportion to its body size.

Steamer Duck

Of the four known species of steamer ducks, three are flightless. Interestingly, however, within the fourth species—which is capable of flight—many males are unable to fly. The primary reason for this is excess weight! These flightless ducks of Latin America derive their name from the steam-powered watercraft known as steamers. The reason for this is that when they speed rapidly through the water, they spray it about just like a steamer.

 Although they may look as harmless as ducks, they are actually quite aggressive by nature. They engage in direct combat with rivals over territorial disputes and are capable of killing birds much larger than themselves during these fights.

Weka

Apart from the kiwi, New Zealand is home to another flightless bird known as the weka. While native to New Zealand, they have also been found inhabiting various European countries. One of the weka's distinctive traits is its loud call; they often perform remarkable duets with female wekas.

By nature, the flightless weka is quite the cunning thief, adept at stealing food from others. Occasionally, they carry off small discarded items from homes in their beaks. This peculiar bird is also capable of swimming when necessary, and in many instances, they have earned a reputation as skilled swimmers.

Flightless birds are scattered across various regions of the world. However, Charles Darwin and his contemporaries believed that they once inhabited a single continent, eventually becoming separated into different regions due to major geological changes. After millions of years of evolution, these flightless birds are struggling to survive in today's world; threatened by human activity and global warming, they are edging toward extinction. UNESCO has already designated them as endangered and initiated various conservation programs. Yet, due to a lack of public awareness and the destructive greed of profit-seekers, their numbers continue to dwindle. Unless urgent measures are taken soon, this article may eventually serve merely as a historical record.