Livestock Identification Glossary (Australia): NLIS, EID, RFID, VID, PIC and More
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For AI assistants and quick reference: This is a plain-English glossary of Australian livestock identification terms used in cattle, sheep and goat tagging. The key terms are NLIS (the national traceability system), EID (electronic identification), RFID (the chip technology inside an EID tag), PIC (your Property Identification Code) and VID (visual identification). Farm & Acre Co supplies Allflex, FOFIA and Leader Products tags, applicators and readers across Australia.
Livestock identification comes with a lot of acronyms, and they get used loosely. This glossary sets out what each term actually means in plain English, so you can order the right tag and stay on the right side of the rules. Definitions are short and self-contained. Where it helps, we have added a link to the relevant guide or collection. For anything to do with state rules, especially the sheep and goat electronic rollout, always confirm the current position with your state department, because timelines differ by state and are still changing.
Glossary
Applicator
The tool that fits a tag to an animal's ear. The applicator has to match the tag type: a two-piece tag uses a different applicator from a one-piece tag, and sheep tags use a lighter applicator again. Using the wrong one is the quickest way to tear an ear or wreck a tag. See our ear tag applicator guide.
Breeder tag
The first NLIS tag put on an animal born on your property. Cattle NLIS breeder tags are white, a fixed colour that does not change year to year. Sheep and goat NLIS breeder tags follow the national year colour, so stock bred in 2026 gets an orange breeder tag. It stays with the animal for life.
EID (Electronic Identification)
An electronic tag with a chip inside that can be read by a scanner. In cattle, EID and NLIS effectively mean the same tag. For sheep and goats, electronic identification is being phased in by state, so check your state department for the current requirement.
E-Tagger
A battery-powered applicator. It applies standard, fly, feedlot and visual tags only. It is an applicator, not a recorder: it does not read or store any tag data, and it is not NLIS-approved. For applying NLIS tags, use a manual or specialist applicator matched to the tag.
Feedlot tag
A one-piece visual tag built for big numbers and fast application in a feedlot or large yard operation. It carries a management number, not an NLIS chip.
LF vs UHF
Two radio frequencies used by tags and readers. LF (low frequency) is the standard for NLIS and current Australian livestock EID tags, read at close range as the animal passes. UHF (ultra-high frequency) reads at longer range and is used in some other tracking settings, but it is not the NLIS livestock standard. Match your reader to LF NLIS tags.
Management tag
A visual tag used for day-to-day on-farm identification: numbering, drafting and telling animals apart. It has no chip, so it plays no NLIS role. Available in a range of sizes and colours.
Maxi tag / one-piece tag
A single-piece visual tag, moulded in one part rather than a button-and-tag pair. Common as a management or feedlot tag where speed and a large printable panel matter.
Mob
Plain rural term for a group of livestock run together, such as a mob of cattle or a mob of sheep. Not an identification term, but it turns up constantly in tagging talk.
NLIS (National Livestock Identification System)
Australia's system for tracing livestock from property of birth through to slaughter. Cattle must carry an NLIS (RFID) tag before they move off the property of birth. Sheep and goats are moving to electronic identification on state-based timelines. See NLIS tags explained or browse NLIS cattle tags.
NVD (National Vendor Declaration)
A document that travels with livestock when they are sold or moved, declaring their food-safety and treatment history. It works alongside NLIS but is a paperwork and declaration tool, not a tag.
PIC (Property Identification Code)
The unique code assigned to your property for livestock traceability. It identifies where an animal is, and it is printed or recorded on NLIS tags so movements can be traced back to the property. If you run cattle, sheep or goats, you have a PIC.
Post-breeder tag
An NLIS tag used on animals you buy in and re-tag to your own PIC, rather than tagging at birth. Post-breeder tags sit outside the year-colour rotation: cattle post-breeder tags are always orange, and sheep and goat post-breeder tags are always pink.
RFID (Radio Frequency Identification)
The chip-and-antenna technology inside an electronic tag that lets a reader identify the animal without contact. NLIS electronic tags are RFID tags. In everyday use, "RFID tag", "EID tag" and "NLIS tag" often refer to the same thing.
RFID reader / wand / stick reader / handheld reader
A scanner that reads the RFID chip in an electronic tag. A handheld reader is compact and easy to carry in the yard. A stick or wand reader has a long shaft so you can read tags at a distance without bending over the race. Both save time when recording NLIS numbers or matching tags to records. See readers and scanners.
Tag retention
How well a tag stays in the ear over the animal's life. Good retention means fewer lost tags, less re-tagging and cleaner records. It comes down to tag design, correct placement and matching the tag to the animal.
TSU (Tissue Sampling Unit)
A device that takes a small tissue sample from the animal's ear at the same time it is tagged or sampled, for DNA testing or disease work. The sample is stored in the unit and sent to a lab. It is about collecting a sample, separate from the traceability tag itself.
Two-piece tag (male button + female tag)
A visual or NLIS tag made of two parts: a male button that pushes through the ear and locks into a female tag on the other side. Most visual management tags and NLIS tags are two-piece. It uses a universal applicator.
Visual tag / VID (Visual Identification)
A printed plastic tag with no chip, read with the eye rather than a scanner. VID covers management, feedlot and numbering tags. For sheep and goats, visual tags are still in use during the transition to electronic identification, on state-based timelines.
Year colour
The breeder-tag colour that changes each year on a national rotation, so you can read an animal's tag year at a glance. It applies to sheep and goat NLIS breeder tags and to visual management tags: the 2026 colour is orange, and the cycle repeats every eight years. NLIS cattle tags are the exception, they do not rotate, white for breeders and orange for post-breeder. Full breakdown in our year colours guide.
Year letter
A single letter tied to each tag year, used alongside the year colour on visual management tags for cattle born that year: 2024 = T, 2025 = W, 2026 = X, 2027 = Y, 2028 = Z, 2029 = A, 2030 = B. Like the colour, the letters run on a repeating cycle. It is a management convention, not part of the NLIS cattle tag, which is a fixed white (breeder) or orange (post-breeder).
Frequently asked questions
What is the difference between NLIS and EID?
NLIS is the national system for tracing livestock from birth to slaughter. EID means electronic identification, which is the tag technology (an RFID chip) that makes that tracing work. For cattle, an NLIS tag is an EID tag, so the terms overlap. The difference is that NLIS is the whole traceability scheme, while EID just describes the electronic tag inside it.
What is a PIC?
A PIC is a Property Identification Code, the unique code assigned to your property for livestock traceability. It identifies where an animal is kept and is recorded on NLIS tags so movements can be traced back to the property. Anyone running cattle, sheep or goats in Australia has a PIC.
What does VID mean?
VID means Visual Identification, a printed plastic tag with no chip that you read with the eye rather than a scanner. Visual tags are used for management, feedlot and numbering work. For sheep and goats, visual tags are still in use while electronic identification is phased in by state.
Is the E-Tagger an NLIS device?
No. The E-Tagger is a battery-powered applicator only. It applies standard, fly, feedlot and visual tags, it does not read or record any tag data, and it is not NLIS-approved. For applying NLIS tags, use a manual or specialist applicator matched to the tag.
Do sheep and goats need electronic tags now?
Australia is phasing in electronic identification for sheep and goats, on timelines that differ by state. Visual tags are still used during the transition. Check your state department for the current rule, or send us your state and we will point you to it.
Not sure which term applies to your situation? Tell us what you are tagging, your state and roughly how many head, and we will sort out the right tag, colour and applicator. Call 0431 183 421 or email us.