When a bee flies we hear the sound produced by its wings why can't we hear a crow flapping its wings as it flies?

The sound produced by a bee's wings is more noticeable because their rapid wing beats create a high-pitched buzzing noise due to their small size and fast movement. In contrast, a crow's wings are larger and flap more slowly, producing a softer, lower-frequency sound that is often masked by other environmental noises. Additionally, the structure of a crow's wings allows for more efficient flight with less noise, making their wing flaps less audible.