Only five black rat specimens were identified from samples after 1760, and just two samples out of 108 showed black rats occuring after 1800. Meanwhile, brown rat samples proliferated over the ...

Common brown (dekay) snakes, black rat snakes & black racers can be hard to ID. Here’s how to tell them apart. Non-venomous NC snakes that can look like a baby copperhead | Raleigh News & Observer ...

Shipping networks across the Atlantic “essentially functioned as rat superhighways,” and one species took over the East Coast in only a matter of decades. Here’s how the lowly brown rat came ...

Brown rat droppings are dark brown and tapered at the ends, while black rat droppings are curved. Mouse droppings are black and can be mistaken for those of rats or cockroaches.

Shipping networks across the Atlantic “essentially functioned as rat superhighways,” and one species took over the East Coast in only a matter of decades. Here’s how the lowly brown rat came ...

By LAURA UNGAR | AP Science Writer. Brown rats are the undisputed winners of the real rat race. New research suggests that they crawled off ships arriving in North America earlier than previously ...