Understanding food sources and “harborage,” or areas where rats like to live, is crucial to addressing the problem. For example, brown rats typically burrow in the ground, near humans.

The author describes several characteristics of the Nile grass rat that make this diurnal murid rodent an attractive laboratory animal. In the laboratory, Nile grass rats are clearly diurnal (Fig.

“Anytime we have any sort of water main repair or sidewalk repair, any sort of digging or excavating under the ground ... injecting carbon dioxide into rat burrows. Still, according to Olsen ...

But all around their feet − beneath bushes, over subway grates and between trash cans − were traps, barriers and birth-control-infused snacks to fend off rats in the heart of the nation's largest city ...