They normally scurry around both day and night.
Possum or rat in roof.
They may eat fruit and other human leftovers but tend to feed on native vegetation and are not found as often as rats are scavenging indoors and or ransacking stored foodstuffs.
The 2nd noise could be rats or mice.
Their droppings tend to be scattered everywhere within a roof whereas possum droppings are usually found in small clusters often around their chosen sleeping place.
Possums will only be on your roof regularly for three reasons they are living in your roof they are living on your roof or they are using your roof to get from a to b.
If they are nesting on the insulation in the roof this can become damaged through constant urination and will require replacing.
The is generally two animals which make noises in your roof.
Possums and rats can cause damage in the roof by eating through electrical wires.
I have seen possums eating ratsack and seen one that had a rat trap on it s leg and if you think they are noisy running through the roof you should hear them when a rat trap is attached to their foot.
Possums do nest in roofs but are mainly active at night and although they are agile climbers are heavier than rats in their movements.
A possum is a large animal and it has no qualms relieving itself in your roof.
They can be extremely noisy running and thumping through your ceiling.
Urine may also seep through and damage your ceiling.
Rats either way if you think there may be possums in the roof then every effort must be made to get them out before you try and deal with rats.
Rats and mice constantly move around except when nesting.