Looks pretty blah in the photos.
It is bones though, so that may be part of it.
Striking contrast may be better than drybrushing in this case.
The bats seem undefined and a real mess. I mostly blame the cast.
I'd paint the head stone very light grey or cream and highlight white.
More of a brown dirt and maybe some flock.
From black, paint the bats bodies grey, the wings pink-maroon, for contrast with grey bones.
Eyes white, red or yellow.
Something like that, for max contrast.
Last things I did like these were LOTR ones. But they were more spread out and sharper cast.
link
That's better, but still, it's a horror of a cast. Very appropriate.
