New Holland Mouse

New Holland Mouse

Kingdom
Phylum
Subphylum
Class
Order
Superfamily
Family
Genus
SPECIES
Pseudomys novaehollandiae
Population size
8,000
Life Span
1.5-2 yrs
LENGTH
65-90 mm

New Holland mice are little rodents that have a grey-brown fur with a dusky-brown tail, which is darker on the dorsal side. These mice look very similar to the Common house mouse, which was introduced to the area by European settlers. However, New Holland mice have slightly larger ears and eyes and they lack a distinctive 'mousy' odor.

Video

Distribution

New Holland mice are found only in south east Australia, within the states of New South Wales, Queensland, Victoria, and Tasmania. They inhabit woodlands, forests with a heathland understorey and vegetated sand dunes, and open heathlands.

Geography

Habits and Lifestyle

New Holland mice are social animals. They live in burrows that are carved out by colonies of mice in softer sands. These mice are active at night and spend a majority of their time foraging.

Seasonal behavior

Diet and Nutrition

These omnivorous mice feed mainly on seeds above ground. Although seeds are the most prominent component of New Holland mice diet, they also consume leaves, fungi and small invertebrates.

Mating Habits

REPRODUCTION SEASON
August-January
BABY CARRYING
1-6 pups
INDEPENDENT AGE
3-4 weeks
FEMALE NAME
doe
MALE NAME
buck
BABY NAME
pup

Little is known about the mating habits of New Holland mice. Young are born between the months of August and January, and their breeding patterns are based on the amount of food obtained, which depends on rainfall. Births occur in the mother’s nest during the day. Litters normally consist of 1-6 pups. During their first year of reproduction, females will normally produce only one litter a season, but during their second year they can produce up to three or four litters. Females nurse their young for 3-4 weeks. Males in this species reach reproductive maturity at around twenty weeks of age, females will mature at around thirteen weeks of age.

Population

Population threats

Main threats to New Holland mice are inappropriate fire regimes, habitat loss and fragmentation, climate change and habitat degradation due to weeds, livestock and non-native herbivores. The most severe and pressing danger comes directly from the threat of predators in the environment. Predation is brought upon by the natural predators in the environment. Such predators include the Red Fox, cats, and dogs. In addition to the increase of predators, an increase in competition for resources in the environment has also been noted a contributor to their decline. The competition is most frequently encountered between other species of rodents in the same habitat.

Population number

According to the IUCN Red List, the total population size of New Holland mice is around 8,000 mature individuals. This species’ numbers are decreasing and it is currently classified as Vulnerable (VU) on the IUCN Red List.

References

1. New Holland Mouse on Wikipedia - https://en.wikipedia.org/wiki/New_Holland_mouse
2. New Holland Mouse on The IUCN Red List site - https://www.iucnredlist.org/species/18552/22398752

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