I came across the work of Barbara Harmon. She is a mural artist who specializes in drawing animals. I must say, she has much more skill than I have, or at the very least, MUCH more time!
She created a series of blog posts outlining her work for Assabet River National Wildlife Refuge– the mural that I like is the night time mural. Very dark in its design, the mural is installed with spotlights on specific elements of the piece- increasing the highlight of target areas – in this case, night animals. At the link you can see all the details close up.
Often times you have to work around light, audio, plumbing and security features of a wall when considering a wall mural- but in this case she uses light, and (if you read) sound to augment and bring the mural to life.
Kudos to Barbara.