BirdGetSpeed.md

public class Bird
{
    // whatever properties do birds have
    public BirdType Type { get; set; }

    public double GetSpeed()
    {
        switch(Type)
        {
            case African:
                // logic for African birds
            case American:
                // logic for American birds
            case European:
                // logic for European birds
            default:
                // default logic
        }
    }
}