Dusky rat vs Polynesian rat
The dusky rat is heavier: 61 g against 47.3 g for the polynesian rat, about 29% more.
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Photo: Cliff from Arlington, VA, USA · CC BY 2.0 · Wikimedia Commons
What is the difference between a dusky rat and a polynesian rat?
Each point below is worked out from a pair of recorded values.
- The dusky rat is heavier: 61 g against 47.3 g for the polynesian rat, about 29% more.
- The polynesian rat is longer-lived: 3.91 years against 1.5 years for the dusky rat, about 2.6 times the lifespan.
- Both belong to the genus Rattus, so they are close relatives.
- Both are listed as Least Concern on the IUCN Red List.
- They are on record for 1 of the same countries (the dusky rat for 1 in total, the polynesian rat for 1). Country data is incomplete and can include zoos, so this does not show whether they meet in the wild.
Side by side
| Dusky rat | Polynesian rat | |
|---|---|---|
| Scientific name | Rattus colletti | Rattus exulans |
| Family | Muridae | Muridae |
| Order | Rodentia | Rodentia |
| Weight | 61 g – 152 g | 47.3 g – 60.3 g |
| Length | Not recorded | Not recorded |
| Lifespan | 1.5 years | 3.91 years |
| Main food | Not recorded | Not recorded |
| Habitat | Not recorded | forest |
| Conservation status | Least Concern | Least Concern |
| Countries recorded | 1 | 1 |
A scale drawing needs a recorded length for both animals; only weights are on record for this pair.
Full record: Dusky ratFull record: Polynesian ratCompare other animals