brown rat

1 Scientists used to think that brown rats arrived around 1776.

2 Now researchers are shedding light on why brown rats are the undisputed winners of the real rat race.

3 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.

4 The two most widespread and infamous rat species are the black rat (Rattus rattus) and brown rat (Rattus norvegicus).

5 The Vancouver Rat Project found that, in a typical day, the city’s brown rats stay within the length of a city block.

6 To get an idea of the parasite’s whereabouts, scientists studied 33 wild brown rats found dead in an Atlanta zoo between 2019 and 2022.

7 The city’s rat is a Rattus norvegicus, also known as the brown rat, wharf rat, or sewer rat.

8 Unlike the brown rat, the black rat is known to have carried plague through fleas on its body.

9 The brown rat has prominent ears and a long scaly tail.

那只棕鼠两只耳朵向前支着，一条长尾巴布满鳞片。

1 褐鼠

sewer rat

2 鼠科

mouse rat hamster vole gerbil muskrat jird woodrat zokor house mouse black rat deer mouse grasshopper mouse snow vole meadow vole red backed vole steppe lemming harvest mouse bamboo rat rice rat white footed mouse water vole cotton rat field vole bank vole hopping mouse bandicoot rat spiny mouse stick nest rat vesper rat