I subscribe to the Inspirations magazine and in issue 52 they had this blackwork butterfly by Tanja Berlin.
I like it and I would like to try to replicate it with machine embroidery (my hand embroidery is hopeless …).
Here’s part of a wing that I’ve been working on in Thred.
It still needs a bit of work and it will be quite a drawn out process (not as long as doing it by hand though)
And another wing …
I’ve also changed the angle of the fill slightly.