Hi again mate,
Either way would work - copy/pasting whole layers or copy/pasting a block of frames. The result will be the same.
The goal is to put the animation inside a container, so that you can treat is as one entity from the outside - i.e. you will be able to move, scale, flip, tween, adjust color and brightness and so on. And you will be able to have as many Instances of it as you like.
Here is what I would do:
1. Create a new layer on top of everything.
2. Create a place-holder rectangle on that new layer.
3. Click on the rectangle, press F8 and convert that to a Graphic Symbol.
4. Select the bird layers by clicking on the bottom layer, then holding down Sift and clicking on the top layer.
5. Copy the selected layers by choosing Copy Layers from the context menu when you right-click on any of those layers' names.
6. Double-click the newly created symbol to enter it In Place.
7. Right-click on rectangle's layer name and from the context menu choose Paste Layers.
8. Delete the rectangle's layer.
9. Exit the symbol.
10. Delete your original layers as they should have never been there in the first place.
11. Use the container, create and many instances and move them around.
More information how you should organise your files for animation:
https://flash-powertools.com/workflow/
https://flash-powertools.com/character-rigging-for-flash-animation/
and some samlpe files to study: https://flash-powertools.com/tag/free-download/
Good luck!
Nick - Character Designer and Animator, Flash user since 1998 | Member of the Flanimate Power Tools team - extensions for character animation