Ivan's Space Bird:

This space curve was produced using the following Maple commands:

> x:=rho*cos(sin(t));
> y:=rho*sin(cos(t));
> z:=t/2/Pi/10;
> rho:=1+1/2*sin(t/10);

                         x := rho cos(sin(t))


                         y := rho sin(cos(t))


                                       t
                            z := 1/20 ----
                                       Pi


                      rho := 1 + 1/2 sin(1/10 t)

> with(plots):
> spacecurve([x,y,z],t=0..40*Pi,numpoints=10000,
>   axes='NORMAL',orientation=[75,45],thickness=2);