RODENTS
There are 3 different rodent mammal species living around Holbrook.
– House mouse (Mus musculus)
– Black rat (Rattus rattus)
– Water-rat (Hydromys chrysogaster)
WATER RAT
Appearance
The water-rat is large in size (up to 40cm long with 25-30cm long tail). They have grey to brown fur with white to orange belly. They have a thick tail with white tip, webbed hind feet, long blunt nose and a pair of yellow, chisel shaped incisor teeth.
Habitat
You will fins the water-rat living in burrows close to permanent bodies of water.
Diet
The water-rat feeds off mainly large insects and fish.
Breeding
Breeding can occur all year round, with peaks in spring and summer. Gestation is only 35 days long, with 3-4 young in each litter. The water-rat can breed up to 5 times per year.
Predators
Introduced species like cats and foxes prey on water-rats.
They are also vulnerable to habitat change including flood mitigation and swamp drainage.
Prey
The water-rat preys on fish, frogs, lizards and even small water birds
Life expectancy
2-4 years of age


