Cactus mouse vs Oldfield mouse
The cactus mouse is heavier: 23.7 g against 13 g for the oldfield mouse, about 83% more.

Photo: United States National Park Service · Public domain · Wikimedia Commons

Photo: United States National Park Service · Public domain · Wikimedia Commons
What is the difference between a cactus mouse and a oldfield mouse?
Each point below is worked out from a pair of recorded values.
- The cactus mouse is heavier: 23.7 g against 13 g for the oldfield mouse, about 83% more.
- The cactus mouse is longer-lived: 7.4 years against 5.5 years for the oldfield mouse, about 35% longer.
- Both belong to the genus Peromyscus, so they are close relatives.
- Both are listed as Least Concern on the IUCN Red List.
Side by side
| Cactus mouse | Oldfield mouse | |
|---|---|---|
| Scientific name | Peromyscus eremicus | Peromyscus polionotus |
| Family | Cricetidae | Cricetidae |
| Order | Rodentia | Rodentia |
| Weight | 20 g – 23.7 g | 13 g – 14 g |
| Length | Not recorded | Not recorded |
| Lifespan | 7.4 years | 5.5 years |
| Main food | Not recorded | Not recorded |
| Habitat | Not recorded | Not recorded |
| Conservation status | Least Concern | Least Concern |
| Countries recorded | Not recorded | Not recorded |
A scale drawing needs a recorded length for both animals; only weights are on record for this pair.
Full record: Cactus mouseFull record: Oldfield mouseCompare other animals