CENTRAL FLORIDA CRITTER OF THE DAY: Eastern Hognose Snake (Heterodon platirhinos)
I pretty sure this is the Eastern Hognose Snake. This species has been a regular visitor to my place and it looks like maybe they like living under my shed. This guy (gal?) was quite hefty, the largest I’ve seen.
They make for interesting encounters, as they “feign death” to fool predators (such as my Irish setter): http://www.beautifulwildlifegarden.com/hog-wild-snake.html
Here’s a better look at the head: