Original: All members sleep together in a nest made out of shredded bark in a tree hollow , anywhere from 6 to 30 metres above ground level and roughly in the centre of a territory of 10,000 to 20,000 square metres , which they defend actively .
Simplified: They sleep together in a nest made out of shredded bark in a tree hollow . They have a territory of up to 20,000 square metres , which they will defend from other possums .