This week’s frigid weather has many New York City residents shivering, scurrying into cozy spots and feeling sapped. Including the rats. The United States’ most populous city has been spared the Upper ...

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 prolonged periods.

New York City’s cold snap is good news for the city’s rat catchers - New York’s ‘rat czar’ Kathleen Corradi says the weather ...

Due to the small size of the animal, different anatomical considerations, and different evaluation protocols, as well as to meet the optimal outcome of detailed thoracic ultrasound, a standard ...