Global police forces have carried off the largest reptile trade bust to date, arresting 12 suspects and seizing more than 4,000 live reptiles at airports, breeding facilities, and pet stores across Europe, North America, and elsewhere throughout April and May.

The initiative, dubbed Operation Blizzard—a play on words referring to the deluge of activity around lizards—was coordinated by Interpol and Europol in response to the illegal trade in snakes, turtles, and other protected reptiles. Trafficking of these animals is threatening some species with extinction and also fueling disease outbreaks among humans. (See how the exotic pet trade can endanger reptiles.)

The exotic reptile trade has exploded in the past two decades, with millions of the animals now imported—legally and illegally—into