The surrounding area was a mosaic of sclerophyll forest, woodland, savannah, and plains, but sand dunes would have also formed along the edges of the Menindee.

[11] Broad hips and ankle joints, adapted to resist torsion or twisting, point to an upright posture where weight is supported by one leg at a time.

[4] If P. goliah were to have travelled by hopping, the highest possible balance between size and speed would have been peaked, because its body would have been the largest possible to be carried by this method of locomotion.

[6] For P. goliah, tendon stress was identified, which indicates limited locomotor capabilities, exposing a correlation between body mass and locomotion abilities.

[14] Ruptures in tendons demonstrate strain in elasticity of muscles in the limbs, which provides evidence that perhaps the hypothesised ability for P. goliah to hop may have been unlikely.

Large bicuspids, crenulated dental crowns, and a massive bony jaw present in the fossil evidence of P. goliah would have been required to process and digest a substantial amount of leafy fodder.

[15] Through the study of isotopic composition of P. goliah tooth enamel, in addition to biomechanical bone features, dietary clues and feeding behavior have been deduced.

[7] Those who support the hypothesis of a human-mediated extinction process cite that the arrival of humans to continental Australia occurred around the same time as the disappearance of this species.

These diet patterns disprove theories that P. goliah's extinction was due in large part to a reduction in food supply from fire.

[7] At the same time, because of the kangaroos' elongated breeding cycles, their ability to increase population numbers after human predation was highly limited.

[16] Kangaroos living in dry, arid environments have been shown to exhibit higher densities of tooth enamel, caused by indirect hydration through consuming herbaceous plants.

Lower levels of this enamel in P. goliah teeth found in areas with similar environmental parameters compared to the modern grazing kangaroos suggests that it relied far more heavily on free-standing water sources such as lakes and streams.

Yet, records show that such droughts had characterised this region for the previous 7 million years, with P. goliah surviving multiple intensely dry episodes during this period.

Any period of significant decreases in rainfall did not occur until 5,000–10,000 years after the approximate extinction of P. goliah 45–50 kya, 20 ky before the last glacial maximum of high aridity.