Luck helps with colubrid no doubts I have a few of them and honestly I think I only have 4 or 5 pictures.

Make sure your setup is ready take your animal out shoot away and hope that maybe a picture or two will turn out good.

Know when you snake as enough when he start moving like crazy is he pretty much done and if you keep trying taking shots all you do is really waste your time.

I found young BP easier to photograph than older ones, I do not have many shots of my adults.

I litterally take hundreds of pictures of the same animal and usually keep on good shot (if I am lucky)

One trick I heard about but I never tried is to use a cool bowl to put on the top of your snake right before the shoot.