The head doesnt look as wide as a rattlesnake's head is.
But its my understanding that all snakes can still bite. (even if they are not venomous)
This one looks kind of cute, though. He looks like he's wondering if he's scaring you with his rattlesnake act.
As somebody who has stared down a real (and big) rattlesnake in a battle to the death,
I feel qualified to make that statement. LOL.
So presumably you escorted your guest outdoors?
How cold is it outdoors, is it freezing? if the weather is abnormally cold, he likely came in to get warm.
Ive seen fairly large snakes in my back yard too. (Not far from NYC) As big as that one. Never seen a rattlesnake here though. They are here but not so easy to find. Not like in California. (where you see them all the time in some areas)
Also we have colorful salamanders, including endangered blue ones. They all are very pretty.
Its surprising how much wild life there is around here. Ive often seen large male deer with large antlers.
Almost like elk.
Also turkeys, foxes, and it's my understanding we also have the occasional bobcat although Ive never seen one.
A mountain lion was also found dead along a road in Connecticut in 2011, but it was determined that it had literally walked its way across the country from the Black Hills area of South Dakota by its DNA.