Evolution Of Animal Flight

Consider the housefly, trying to land on your lunch, its wings beating so rapidly they make a buzzing sound. Compare that with the stately heron, arcing its wings as it lifts gracefully into the air and flaps slowly, silently away. Two completely different patterns of motion: It's amazing that both produce flight.

Consider the housefly, trying to land on your lunch, its wings beating so rapidly they make a buzzing sound. Compare that with the stately heron, arcing its wings as it lifts gracefully into the air and flaps slowly, silently away. Two completely different patterns of motion: It's amazing that both produce flight.