Feral deer damage native vegetation, compete with livestock for feed, and contribute to soil erosion and habitat degradation.
They also can pose physical risk to Horses through gouging and other injuries related to spooking.

Wild pigs cause extensive environmental destruction by rooting up soil, damaging crops, and spreading invasive weeds. They also carry diseases that threaten livestock industries and contaminate water sources.

Foxes are highly effective predators that have devastated native wildlife populations, particularly small mammals and ground-nesting birds. Their presence continues to threaten endangered species and disrupt ecological balance.

Feral cats are one of the leading causes of native animal decline in Australia, killing billions of animals each year. Their impact is especially severe on small mammals, reptiles, and birds, many of which are already vulnerable or endangered.

Feral goats are a major pest due to overgrazing vegetation, causing land degradation, soil erosion, and damage to native ecosystems. For farmers, they compete directly with livestock for feed and water, reduce pasture productivity, and can damage fencing and infrastructure, leading to economic losses.

Wild dogs, including dingoes and hybrids, can prey on livestock, causing significant economic losses for farmers. They can also disrupt ecosystems when populations are unbalanced or encroach on human settlements.

Rabbits degrade land through overgrazing, leading to soil erosion and loss of native plant species. Their rapid breeding allows populations to explode, making control essential to protect agriculture and ecosystems.

Some bird species can become pests in urban and agricultural areas, spreading disease, damaging infrastructure, and contaminating food sources. Large populations may also displace native bird species and create sanitation issues.