They first transform from sleek fliers, into balls of feathers, and then their necks and feet slowly get swallowed up into the floof until there is nothing left but a ball of feathers.
Also, here is Romeo and Lulu my diamond doves being adorable little lovebirds.
Well, that pretty much is it. But there's still bird, just a bird so fluffy it ended up being hidden underneath their own feathers. Adorable, provided the bird is alive and well under there. (It's not covered completely in this case, their beak is still visible and their eyes and head, but their neck got fluffied) They got their own hiding spot without even having to move an inch, just grow feathers to become fluffy (and adorable too) Don't think it would trick anyone, but at least they tried. If the bird did that on purpose of course.