Birds can create significant challenges for the grain industry in Australia in a few ways:

Crop damage:

Birds wildlife, particularly species such as the Australian white ibis and cockatoos, can cause significant damage to crops. They may eat or damage grain in fields or storage facilities, reducing the quantity and quality of the crop.

Contamination:

Bird wildlife can also contaminate grain with their droppings, feathers, and other debris, which can lead to spoilage and further reduce the value of the crop.

Pests:

Bird wildlife can attract other pests such as rodents and insects, which can also damage the crop and cause additional problems for farmers.

Cost:

Controlling bird damage can be costly for farmers. Methods such as netting, scare devices, and chemical repellents can be expensive and time-consuming to implement, and may not always be effective, as well as the ethical concern that they can also not be a humane way of controlling bird conflict. 

Overall, birds can pose a significant challenge for the grain industry in Australia, and farmers need to employ effective bird control strategies to minimize losses and protect their crops.