Dogs have been helping scientists eradicate invasive ants in California.
Dogs sniff out destructive ants
A Labrador named Tobias has spent the past three months training so that he can assist with a project to kill off the destructive insects by running his nose through more than 1.6 square-miles of shrubs and small trees searching for nests.
The project was launched in 2009 and, although Tobias has only had a few months training, he didn't find any new ant populations - meaning the action plan had work.
Christina Boser, an ecologist with the Nature Conservancy group, said: ''The ants are very hard to find. He's good at his job, and he enjoys it a lot.''