The role of the The Department of Agriculture, Fisheries and Forestry (DAFF) Biosecurity is to prevent the entry into Australia of exotic pests, diseases and weeds that could affect plant, animal and human health and our environment.
A passenger declaration card is given on the plane to all travellers entering Australia, and you must tick YES if you have any food or goods of plant or animal origin. Prohibited or unwanted items you don't wish to declare should be dropped in the quarantine bin on the way to collect your baggage. On the spot fines apply if you do not declare items of quarantine concern.
DAFF Biosecurity has Quarantine Detector Dogs at work at Terminal 1 (International) which are trained to search for items of quarantine concern. If the dogs come near you, please place your bags on the floor to allow them to be inspected.
Declared items may not necessarily be seized - some items may be inspected and returned, while others may be treated and available for collection at a later date.
A comprehensive list of what you must declare and what you must not bring into Australia is located on the DAFF Biosecurity website at http://www.daff.gov.au/ba.