The rats found in New York are brown or Norway rats, rattus norvegicus. Exactly how many live here is anyone’s guess. Jonathan Richardson, a professor of biology at the University of Richmond who ...

He grows in snails, thrives in rainy conditions, and can infect the brains of humans and animals: The rat lungworm is ...

Despite its name, the Norway rat (Rattus norvegicus) originated in Asia, brought to the U.S. via ships centuries past. The Norway rat is known by many names, including the brown rat, wharf rat ...

New York City's wild rat species — Rattus norvegicus, also called the Norway rat or brown rat — doesn't hibernate in winter but does become less active when the weather is freezing for ...

New York City’s wild rat species — Rattus norvegicus, also called the Norway rat or brown rat — doesn’t hibernate in winter but does become less active when the weather is freezing for ...

Then, the most prevalent species was the brown rat or Rattus norvegicus. It is now the only rat in New York City, likely arriving in North America just before the American Revolution.

The rats, now simply called “PGH rats,” are still around—and they’re far from being the only rodents in town. Like all urban centers around the world, Metro Manila is teeming with members of genus ...

The Spruce Pets explains that most per rats are a type called the Norway rat (Rattus norvegicus), which is also known as common rat, brown rat, street rat, sewer rat, Hanover rat, Norwegian rat or ...

The newcomers thrived for a few decades, but they were quickly displaced by their far more adaptable cousins: Rattus norvegicus, better known as the brown rat. The brown rat was astonishingly ...

Rats — non-native black (Rattus rattus) and brown (Rattus norvegicus) — are drawn to any sort of outside food sources such as pet food, chicken food, bird seed and kitchen scraps in compost piles.