You can glide your hand across water or air if you turn it sideways. When a bird flies, its wings are flat to allow air to circulate around the animal in the direction in which it is flying.
This results in the formation of a forward-slicing bird wing that is pushed upward from the bottom.
What makes birds able to fly
- Birds have hollow bones that are extremely strong and light.
- Their feathers are delicate, and their wings are perfectly shaped to catch the wind.
- Their lungs are excellent at obtaining oxygen and are extremely efficient, allowing them to fly for extended periods of time without tiring.
- They consume an abundance of high-energy foods.
Kim Bostwick, a Cornell Lab of Ornithology scientist, explains:
Have you ever attempted to move your open palm quickly through water? Wide, flat things, such as your hand or a paddle, have a difficult time moving quickly against water.
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” It’s as if the sea is pulling you back. Have you ever placed your hand outside a moving car window and felt the rush of air against it?
In the wind, you may see-saw your hand up and down. In both circumstances, you can feel the water or air squeezing against your flat palm. However, if you tilt your hand sideways, you may simply glide it through water or air. “
When a bird flies, its wings are flat to allow air to freely circulate around the animal in the direction in which it is flying (like your hand cutting through the water or air). However, something unique and perplexing occurs here.
Because the wing is somewhat bent on top, air flows quicker over the top than it does over the bottom. This means that there will be more air on the bottom side as the air will be slower flowing.
When there is more air on the bottom, a push occurs, and because the push occurs against the wide flat area of the wing, the animal is lifted. Thus, a forward-slicing birdwing is pushed upward from below, resulting in a flying bird! “