In this audio piece titled "Duck_064610", the prominent feature is the distinctive sound of a duck. The ambiance is filled with the natural, rhythmic quacking of the duck, a sound that is deeply associated with this particular animal. The audio is a realistic representation of a duck's vocalization, providing a sense of being in close proximity to the creature. The audio effects, or SFX used, further enhance the authenticity of the duck's sound, creating an immersive and lifelike auditory experience.