Drug traffickers have resorted to many crafty, hard-to-detect methods of disguising what they are up to.

This is not one of those stories.

The Spanish police on Tuesday announced the arrest of a Colombian man whose idea of hiding half a kilogram of cocaine — more than a pound — was to put the package, a few inches thick, on top of his head and cover it with an oversized toupee.

The man, whose identity was not revealed, was detained last month at Barcelona’s airport after he landed on a flight from Bogotá. He attracted the attention of airport police officers both because he appeared nervous and because of the size of the bulging hairpiece that he wore under a hat, according to the Spanish newspaper La Vanguardia.