Need expert tips for line techniques

[Silvernet]

Hello

I'm getting used to the power of Xara but would really like folks to show me how to re-create the effects on the three sample images attached. Hope I'm not being to greedy by posting three images but they represent effects I am trying master for logo creation.

1. How do you get that flow effect on the body of the bird?
2. What's the easiest way to create the circles that taper and curve at the same time on the annodata logo?
3. How can you create the globe that consists of individual bars as shown?

I know these can be done but the trick is how to do this efficiently - especially in the case of the globe!

Thanks
Silvernet