Yellow-spotted Monitor digs up mystery prey

Getting hot. So the Yellow-spotted Monitors are enjoying life. And thinking more of food than sex - unlike a few weeks back. But what food? How about unidentified snake?

Came upon monitor digging away at sand hole by road through Townsville Common. Dig, dig,  dig. Head into hole. Out again. Dig, dig, dig. Head... Dig... etc, etc.

Finally, comes up and chews away at slender snake (or, less likely, long, strong legless lizard, or mystery sand worm: or?).

So, did it smell the live prey through the dryish sand? And is the soft egg sac significant? Don't know! Fun, isn't it?