THE FUNCTION OF FEATHER IN BIRDS.

The Bird Society and their dinosaur ancestors have evolved their feathers into wonderful biological structures, appearing in incredible colors and shapes. Here, we study feathers from various scientific perspectives (including its anatomical structure, function, evolution and evolution), thus covering the breadth of spring biology. Despite the incredible shape of the feathers, they are all composed of the protein β-keratin and consist of the same basic parts, arranged in a branched structure. In more complex feathers, the puffer extends to the central branch, branching into fragments, and then to the spines of the small arch where the arms are intertwined nearby.

Image source
The appearance of springs is caused by small changes in the basic branch structure to perform various functions. Fuzzy feathers look very thin because their feather structure is looser, with flexible arches and relatively long arches, which trap air close to the bird's warm body. The pin springs are strong and almost always flat, which is a big difference due to small changes in the chassis. The microscopic arches of the rods are connected to each other to form a waterproof and windproof barrier, allowing birds to fly and keep them dry.

Image source
Many feathers have smooth pinnate polar regions and more organized pineal regions. The wing feathers used for flight are made up of closed micro-knotsBoth sides of the structured central axis have uniform windproof surfaces or scoops. These feathers, also known as scum, have asymmetrically short, less elastic leading edges that prevent circulation in the air. Most tail feathers or patches have a delicate, interconnected structure similar to wing feathers. These springs are shaped like sectors and support precise flight directions.

Birds usually have six pairs of feathers on their tails, showing increased asymmetry relative to the outer pair. In some birds, the tail feathers have evolved into surprising patterns that are useless in flight. Circumferential feathers are what you see that covers the bird's body and simplifies the shape. The waterproof points are arranged in an overlapping manner, just like a tile on the element, and the soft base is folded near the body. Sometimes, the color of contact feathers is even or bright or faded, which can also help birds show off or maintain camouflage.

The contour spring of the wing, called a refuge, makes it form an effective flight plane, thereby softening the area where the flight spring is attached to the handle. The central axis is always hidden among the other feathers of the body, with a delicate central rack, but no hooks on the girders, thus forming a smooth heat-insulating structure.

Similar to a semi-shaft with a more flexible branch structure, but with little or no center extension, and lower feathers Shorter and close to the body, they retain body heat. With short and simple feathers with a slight heel, phyllopoulum tracks the position of the feathers like a mammal's beard. Pig hair is the simplest feather. It has strong ratchet teeth and usually does not have forks. Hair is mainly distributed on the head, which can protect the eyes and face of birds.