As recently as 1944, two distinct species were prevalent: brown rat, and ship rat (black rat, roof rat).
en.wikipedia.org The three alien species of muriod rodents, the brown rat, the black rat and the house mouse, are all widespread in the country.
en.wikipedia.org However, some species, such as the brown rat, red fox, and introduced grey squirrel, are well adapted to urban areas.
en.wikipedia.org The marsh rice rat superficially resembles the introduced species black rat and brown rat, but has larger differences in color between the upper- and underparts.
en.wikipedia.org These include the black rat, brown rat, fallow deer, feral swine, house mouse, and nutria.
en.wikipedia.org