Where else to search?

[reptilesalonica]

Yesterday evening i opened the door from the cage of my beautiful honduran milksnake to add water and a doorbell made me foget it opened.
Then i did something else and somethging else etc...and after 2-3 hours i remembered that the door from the cage was open!
...
Results, i searched the whole house but nothing
The door to the balcony was open, is there a case that it went outside? The outside temp is not cold this time of year in Greece, but just cool.
...

~Greg~