Measures of their population density vary widely , from 50 to 550 individuals per square kilometer ( 250 acres ) .
These numbers are thought to reflect only small , gum - rich areas , and therefore only small , clustered populations with an overall low population density .
Measures of their population density vary widely , from 50 to 550 individuals per square kilometer ( 250 acres ) , but these numbers are thought to reflect only small , gum - rich areas , and therefore only small , clustered populations with an overall low population density .