Some homeowners go for alarms, others choose dogs, but one man has installed the ultimate deterrent to burglars - two adult crocodiles.
Owner Awirut Nathip keeps 15-year-old Thong, who was originally bought as a pet, in the yard at his home in Thailand and Nguen under the house in a ditch because he is so aggressive.
And they have both been the perfect guards so far. There has not been a single burglary for the last 15 years.
"If we're upstairs he'll come and lie in front of the door. We're not worried at all. No one would dare to get in," Mr Nathip said.
Even neighbours say they rest easy with the predators nearby and have welcomed the unusual crime prevention method.
One of them, Prajit Charoensakkhajon, said: "I'm not frightened of him. I'd rather feel secure because he'll watch our homes.
"Thieves wouldn't dare to come round because they think the crocodile is fierce, right?"