A further comment to add to the answers on DANAID from pega and Gowergirl. It is off-putting to draw a blank from all dictionaries. Putting firstly "butterfly + danaid" and then "butterfly + danaida" is quite instructive - the results are very different! This is in my experience guite unusual.
I omitted to add "in Google" after "Putting". Sorry! Of course danaida is the Latin form of the English danaid, but I expected to find this stated, early on, in the search. Perhaps I should have scrolled through more pages - I didn't do more than three, which I find is more than enough usually.