My BP got loose

[Bogertophis]

When my girl got out last year I found her wedged under some moving boxes and between some frames. Thankfully what gave her location away was the cat was staring over there with his fur sticking up! I really hope you find him soon!

You know, that's a good idea...even if you don't have a dog or cat, maybe a good friend does that you could borrow (on leash!)? They often know (smell or sense)
critters that we can't. My dogs sure do...just make sure they're under good control at all times, some breeds (terriers!) I wouldn't trust very far.