一个模拟鸟群飞行的3D程序，鸟群可以大鸟吃小鸟，也可以飞翔或者降落-a simulated 3D flock flying procedures, the flock can eat the bird, the bird can also fly or landing

一个模拟鸟群飞行的3D程序，鸟群可以大鸟吃小鸟，也可以飞翔或者降落-a simulated 3D flock flying procedures, the flock can eat the bird, the bird can also fly or landing