Nature · Level 1 · 125 words
The Owl's Quiet Wing
Original passage © Studio AM, written for Fluency.
An owl flying at night must listen while it moves. Loud wing noise could hide the rustle of prey. Several feather features help many owls reduce that sound.
Comb-like structures along the front edge of some flight feathers break moving air into smaller flows. Soft, downy surfaces and a flexible fringe along the trailing edge also reduce noisy turbulence. Broad wings let an owl fly slowly while staying aloft.
Silent flight is not absolute, and owl species differ. The same features can trade some high-speed efficiency for quiet movement. For an owl hunting by sound, hearing during approach can matter more than racing through open air.
The wing does not erase air. It manages the small disturbances that air makes as feathers move through it.
Source: Written for Fluency. Original passage © Studio AM, written for Fluency.