From the article Jack Campin linked to above:

"Dead mice packed with acetaminophen, strapped to pieces of cardboard and dropped from helicopters may help control one of the big headaches for the Pacific island of Guam – the brown tree snake."

Actually the snakes won't eat anything they don't kill so the mice are alive when dropped from the helicopter. The cardboard tabs snag the tree limbs so they stay in the trees where the snakes can eat them.

The best way to deal with the snakes is to allow Chinese market hunters to trap them for export to China. That has been requested many times by various Chinese but no permission has been forthcoming from the USA.