There are not many people who would try to do pysanky on a finch egg, but I did just that. Actually on several. It is only fair to say that emptying the egg contents out of a finch egg is very very difficult, if not impossible, but I did try. Then getting the tiny fragile egg shell to withstand being pressed under the dye water is difficult as well. When finished (if 
they make it that far) a good sneeze will blow them off a shelf onto the floor. Haha. This is one of those which has survived about 20 years. My phone doesn’t do well with macrophotography (it is pretty old).