How to Stop Your Cat Killing Birds - What Actually Works

Every year, domestic cats in Australia kill an estimated 377 million birds. If your cat is one of them, you're not alone - and you're not a bad owner. Cats are hardwired predators. But there are real, proven ways to reduce the toll on native wildlife without keeping your cat locked inside 24/7.

Here's an honest look at what works, what doesn't, and what the research actually says.

The Scale of the Problem

Australia is home to over 800 bird species, many found nowhere else on Earth. Lorikeets, Australian magpies, honeyeaters, fairy-wrens, and kookaburras share our suburbs with an estimated 3.8 million pet cats — plus millions of ferals.

Photo: Charles J. Sharp, CC BY-SA 4.0, via Wikimedia Commons

Research from Murdoch University in Perth found that even well-fed domestic cats hunt successfully. And here's the uncomfortable truth: cat owners only see about 20% of what their cat catches. If your cat has brought home a bird once, they've likely caught five.

Method 1: Bells on the Collar

Effectiveness: Low (around 25–45%)

Bells are the most common approach, and the most disappointing. Studies show bells reduce bird catches by roughly less than half at best. The problem? Cats learn to move without ringing them. Birds also don't always associate bell sounds with danger — they're not a natural warning signal.

Bells are cheap and easy, so they're worth trying. But if your cat is a determined hunter, a bell alone won't solve the problem.

Method 2: Keeping Cats Indoors

Effectiveness: 100% (but not always practical)

The only guaranteed way to stop your cat catching birds is to keep them inside. Many vets and wildlife organisations recommend this, and it's becoming law in parts of Australia — several councils now enforce cat curfews, particularly at night.

But let's be realistic: many cats are already outdoor cats. Transitioning an adult outdoor cat to indoor-only can cause stress, behavioural problems, and a lot of yowling at 3am. If you can do it, great. If you can't, you need another option.

Method 3: Cat Curfews (Dusk to Dawn)

Effectiveness: Moderate

Keeping your cat in from dusk to dawn helps, since many birds are vulnerable at these times. Some councils in NSW, Victoria, and the ACT mandate this. It's a good starting point, but almost all bird hunting happens during the day — especially in spring and summer when fledglings are learning to fly.

Method 4: Bright Collar Covers (Birdsbesafe-style)

Effectiveness: Moderate to Good (for some bird species)

Brightly coloured collar covers work by making your cat more visible to birds. Research suggests they're effective for birds with good colour vision (like rosellas and honeyeaters), but less effective for birds that rely more on movement detection. US trials looked very promising, but the Australian trial showed poorer results. They also do nothing to protect small mammals like bandicoots and quolls.

Method 5: CatBib

Effectiveness: Reduced predation of birds by 81% (university-tested)

The CatBib takes a completely different approach. Instead of only trying to warn prey, it also mechanically interferes with the cat's hunting mechanics. The lightweight neoprene bib hangs from the collar over the chest. Even before the pounce, the bright colours of the CatBib are designed to stand out from the background and make the cat far more visible to the bird as the cat approaches. Then, when a cat goes into the final pounce — that precise, explosive lunge, front paws out, claws out — the bib acts as a physical barrier between the cat's claws and the prey at the critical moment, disrupting the catch.

Independent research at Murdoch University, Perth found the CatBib: - Reduced predation of birds by 81% — 81% of cats stopped catching birds - Reduces small mammal catches by 45% - Reduces reptile and frog catches by 33%

The lead researcher stated: "The CatBib is an excellent product and lives up to its claims."

Unlike bells or bright colours, cats can't learn to defeat a CatBib — it works on physics, not behaviour. And unlike keeping cats indoors, it lets them maintain their outdoor lifestyle.

Cats can still run, jump, climb, eat, drink, groom, and use cat flaps while wearing a CatBib. It weighs less than 60 grams.

Method 6: Catios and Enclosed Runs

Effectiveness: High (within the enclosure)

Cat enclosures are excellent if you have the space and budget. They give your cat outdoor time while physically preventing hunting. The downside is cost ($500-$5,000+), the fact that your cat is limited to the enclosure area, and they're not suitable for most renters — landlords typically won't allow permanent structures.

So What Should You Do?

There's no single perfect solution — but here's what we'd recommend:

1. Start with a CatBib — it's the most effective single intervention at 81%, it's affordable ($25 AUD), and it doesn't restrict your cat's lifestyle.
2. Keep your cat in at night — cats mainly hunt small mammals by night and birds by day. Nighttime curfews don't prevent hunting — they simply change the mix of prey species. But it does protect nocturnal wildlife and is increasingly required by law.
3. Consider a catio if you're a property owner with the space and budget for a long-term solution.
4. Don't rely on bells alone — the science is clear that they're not enough.

The most important thing is to do something. Australian wildlife can't wait.

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Shop CatBibs — Free shipping Australia-wide. University-tested — reduced predation of birds by 81%.