The grey currawong is an omnivorous and opportunistic feeder.
It preys on many invertebrates, such as snails, spiders and woodlice, and a wide variety of insects including beetles, earwigs, cockroaches, wasps, ants and grasshoppers, and smaller vertebrates, including frogs, lizards such as the bearded dragon as well as skinks, rats, mice, and nestlings or young of Tasmanian nativehen, red wattlebird, eastern spinebill, house sparrow (Passer domesticus), and splendid fairywren (M. splendens), It has been recorded hunting at the nests of the superb fairywren (Malurus cyaneus), and the bell miner (Manorina melanophrys).

A wide variety of plant material is also consumed, including the fruit or berries of Ficus species, Leucopogon species, Exocarpos species, a cycad Macrozamia riedlei, a mistletoe Lysiana exocarpi, Astroloma humifusum, A. pinifolium, Myoporum insulare, Enchylaena tomentosa and Coprosma quadrifida.
The grey currawong also eats berries of introduced plants such as Pyracantha angustifolia and P. fortuneana, and Cotoneaster species, and crops such as maize, apples, pears, quince, various stone fruit of the genus Prunus, grapes, tomato, passion flowers, and the nectar of gymea lily (Doryanthes excelsa).
On Kangaroo Island, the grey currawong has been identified as the main vector for the spread of bridal creeper (Asparagus asparagoides).
Boneseed (Chrysanthemoides monilifera subspecies monilifera), another invasive species readily dispersed in bird droppings, is also consumed by grey currawongs.
In Tasmania, A. pinifolium is especially popular, and one observer noted that the normally noisy birds became quiet and sluggish after eating it, prompting him to wonder whether the plant had a narcotic effect on the birds.

Foraging takes place on the ground, or less commonly in trees or shrubs.
Most commonly the grey currawong probes the ground for prey, but sometimes chases more mobile animals.
It has been recorded removing insects from parked cars, as well as employing the zirkeln method, where it inserts its bill in a crack or under a rock and uses it to lever open a wider space to hunt prey.
In one case, a bird was observed holding bark off the branch of a eucalypt and levering open gaps every 4 to 5 cm (1.5 to 2 in) with its bill.
The grey currawong usually swallows prey whole, although one bird was observed impaling a rodent on a stick and eating parts of it, in the manner of a butcherbird.
A field study on road ecology in southwestern Australia revealed that the grey currawong is unusual in inhabiting cleared areas adjacent to roads.
However, it was not recorded feeding on roadkill, and moves away from the area in breeding season.
It was also commonly hit and killed by vehicles.
The grey currawong is an omnivorous and opportunistic feeder. It preys on many invertebrates, such as snails, spiders and woodlice, and a wide variety of insects including beetles, earwigs, cockroaches, wasps, ants and grasshoppers, and smaller vertebrates, including frogs, lizards such as the bearded dragon as well as skinks, rats, mice, and nestlings or young of Tasmanian nativehen, red wattlebird, eastern spinebill, house sparrow (Passer domesticus), and splendid fairywren (M. splendens), It has been recorded hunting at the nests of the superb fairywren (Malurus cyaneus), and the bell miner (Manorina melanophrys).
A wide variety of plant material is also consumed, including the fruit or berries of Ficus species, Leucopogon species, Exocarpos species, a cycad Macrozamia riedlei, a mistletoe Lysiana exocarpi, Astroloma humifusum, A. pinifolium, Myoporum insulare, Enchylaena tomentosa and Coprosma quadrifida. The grey currawong also eats berries of introduced plants such as Pyracantha angustifolia and P. fortuneana, and Cotoneaster species, and crops such as maize, apples, pears, quince, various stone fruit of the genus Prunus, grapes, tomato, passion flowers, and the nectar of gymea lily (Doryanthes excelsa). On Kangaroo Island, the grey currawong has been identified as the main vector for the spread of bridal creeper (Asparagus asparagoides). Boneseed (Chrysanthemoides monilifera subspecies monilifera), another invasive species readily dispersed in bird droppings, is also consumed by grey currawongs. In Tasmania, A. pinifolium is especially popular, and one observer noted that the normally noisy birds became quiet and sluggish after eating it, prompting him to wonder whether the plant had a narcotic effect on the birds.
Foraging takes place on the ground, or less commonly in trees or shrubs. Most commonly the grey currawong probes the ground for prey, but sometimes chases more mobile animals. It has been recorded removing insects from parked cars, as well as employing the zirkeln method, where it inserts its bill in a crack or under a rock and uses it to lever open a wider space to hunt prey. In one case, a bird was observed holding bark off the branch of a eucalypt and levering open gaps every 4 to 5 cm (1.5 to 2 in) with its bill. The grey currawong usually swallows prey whole, although one bird was observed impaling a rodent on a stick and eating parts of it, in the manner of a butcherbird. A field study on road ecology in southwestern Australia revealed that the grey currawong is unusual in inhabiting cleared areas adjacent to roads. However, it was not recorded feeding on roadkill, and moves away from the area in breeding season. It was also commonly hit and killed by vehicles.
Grey currawong