Brown said DC’s numbers could be so high because the city encourages residents to call in each rat sighting. Public reports ...

Between the species, brown rat bones had a higher delta-N-15 ratio than black rats across sites, suggesting the brown rats were eating more animal protein than their smaller competitors.

If you have a fear of abnormally large rodents, you might want to look away now. A scientist has discovered a whopping species of rat that measures more than 2.5 feet long – three times the size ...

Unlike New York, New Orleans faces a pernicious rat situation because the city is going after not just brown rats, but also black rats. Each place requires a tailored plan to manage its unique set ...

Today, both types of rats exist in North American cities, though brown rats are more prevalent. Some urban centers are especially overrun. New York City, for example, last year hired a "rat czar ...

Measuring 2.7 feet in length, including its tail, and weighing nearly 2kg, the subalpine woolly rat is significantly larger than its brown rat cousin, which grows to 11 inches and weighs 200-300g.

The data collected spanned an average of 12 years and comprised rat sightings, trappings and inspection reports. It revealed “significant increasing trends” in rat numbers in 11 of the 16 cities, ...

Brown said DC’s numbers could be so high because the city encourages residents to call in each rat sighting. Public reports of rats are very useful but can be flawed, said field ecologist Parsons.