Snake Identification needed!

I was watching Zoe through my stamp room window play around in the front garden and then saw her start chasing something. This is the same garden I spent a couple of hours in last weekend working - yikes. Anyhoo, I had to go see what the little huntress had captured. This time it was a snake. Anyone know what kind of snake this might be? This picture makes it look HUGE but if you notice, the grass looks exceptionally large as well. I cropped and enlarged because I was standing far, far, away from the creepy thing.

So proud of herself! This is a better representation of the actual snake size.