As a concession to the more mature audience, comedian and " QI " presenter Stephen Fry replaced puppet Rattus Rattus as host, presenting " added insight and historical nuggets ".
22.
Water rats remain in reduced numbers, but the introduced black rat ( " Rattus rattus " ) and brown rat ( " Rattus norvegicus " ) have largely supplanted the natives.
23.
Unlike its city cousin the Norway rat, which prefers the denuded and grimy confines of the East Coast, the roof rat, or Rattus rattus, prefers the warm climes of the West.
24.
The premise, which involves some of the same writers and actors as the TV series, involves Rattus Rattus recovering pieces of map from the Time Sewers in order to find treasure.
25.
As of winter 2015 the Shiant Isles Recovery Project ( a joint initiative between RSPB and Scottish Natural Heritage ) is underway to eradicate " Rattus rattus " populations on the island.
26.
Females have been observed laying 10 to 30 eggs, around 40 days after mating . " Calumma brevicorne " eggs have been reported to be vulnerable to predation by invasive " Rattus rattus ".
27.
The species is listed as " Endangered " by the International Union for Conservation of Nature due to destruction of its habitat and competition with the introduced black rat ( " Rattus rattus " ).
28.
The black rat ( " Rattus rattus " ) has been introduced to all the islands except Fatu Hiva; in some cases this has had a drastic negative impact on populations of native bird species.
29.
There are references from 1631 and 1720 to people eating rats on Saint Kitts and Nevis, respectively, but these may well have been introduced black rats ( " Rattus rattus " ), not " Pennatomys ".
30.
They also supplement this with vertebrates such the Christmas Island White-eye " Zosterops natalis ", geckos including the introduced House Geckos " Hemidactylus frenatus ", and the introduced Black Rat ( " Rattus rattus ) ".
