On a still Tuesday night at the breakwater, the work you don’t see is the point. While visitors are watching the rocks for a flash of white belly against dark stone, a trained volunteer a few metres away is quietly checking a nest box number against a clipboard, noting a band ID, and moving on without a torch in sight. That’s volunteer monitoring and banding in practice: unglamorous, repetitive, and the reason we know anything at all about how this colony is actually faring.
I’ve stood at the rail on plenty of these nights over the years, and honestly, most visitors have no idea the programme even exists. They come for the penguins waddling home at dusk, which is fair enough — that’s the drawcard. But the counting, weighing and banding happening in the background is what turns “there are penguins here” into something researchers can actually use.
Where the monitoring programme actually began
The long-term study of this colony didn’t start as a side project. Professor Mike Cullen of Monash University began systematic monitoring in 1986, prompted by a harbour redevelopment proposal that put the colony’s future in question. He ran fortnightly night trips out to the breakwater for the next fifteen years, with Neil Blake of St Kilda Council assisting on the ground. Cullen died in 2001, but the fortnightly rhythm he set up didn’t stop with him — volunteers have kept the monitoring going in the decades since, which is a fairly unusual thing for a small urban colony to have. Most breakwater or foreshore penguin populations around the world don’t have anything like forty years of continuous data behind them.
That history matters because it changes what the current volunteer effort is actually for. It’s not a one-off survey. It’s a continuation of a data set going back to the mid-1980s, and every count added tonight is compared against a very long baseline.
What a banding session actually involves
Banding sounds more dramatic than it is. A trained volunteer gently retrieves a bird from its nest cavity, checks whether it’s already carrying a band, and if not, fits a small individually numbered band to the leg. If the bird’s already banded, they record the ID, note condition, and weigh it before releasing it back into the cavity within a minute or two. The birds are handled as little as possible and the whole process is designed to be quick — stress on the animal is the thing volunteers are actively trying to minimise, not an acceptable cost of doing the work.
Weighing sounds trivial but it’s arguably the single most useful data point collected. A penguin’s weight tells volunteers roughly how foraging conditions at sea have been, whether a bird is building fat reserves before its moult, or whether a breeding adult is running down its own condition to keep chicks fed. None of that is visible from the viewing area. You can watch a penguin cross the rocks and have absolutely no idea if it’s thriving or struggling — the band and the scale are what make that legible.
Why individual identification matters more than a headcount
A simple headcount tells you how many birds turned up on a given night. It tells you almost nothing else. Banding is what turns a headcount into a life history.
Because little penguins are usually monogamous within a season and tend to reuse the same nest cavity year after year, banded birds let volunteers track pairs over time — who’s paired with whom, whether a pair has re-formed after last season, and whether a young bird that lost its first mate has found a new one. Somewhere between 18 and 50 percent of young birds do exactly that after a first pairing doesn’t work out, and you’d never know that figure without years of banding records to draw on. It’s one of those stats that sounds oddly precise until you remember it’s built from decades of somebody physically checking a nest box every fortnight.
Banding also lets researchers track survival and return rates, which is the kind of long-view data that would be impossible to reconstruct after the fact. If a bird disappears from the records for good, that’s information too, even if it’s the sad kind.
The breeding season workload
The monitoring calendar tracks the breeding calendar fairly closely, and the workload is not evenly spread across the year. Courtship and nest re-forming run from late July into October. Eggs are laid from August through early November — a clutch of two, incubated for roughly five weeks by both parents taking turns. Chicks hatch from September through December and are fed on whole fish brought back from the day’s foraging.
This is the period when volunteers are checking nest boxes most intensively: confirming which pairs are back, whether eggs have been laid, how many chicks have hatched and survived to fledging. It’s also, not coincidentally, the period when the colony is at its most vulnerable to disturbance, which is one of several reasons volunteers are so firm about keeping dogs off the rocks and cameras away from nest entrances during these months.
Then there’s the moult, which happens over about two weeks each summer. An adult in moult can’t go to sea — its feathers aren’t waterproof during that stage — so it fasts on stored fat while it replaces its whole coat. Weight checks around moult time are particularly telling, because a bird going into moult underweight is a bird under real stress. If you want the fuller seasonal picture, our penguin seasonal calendar lays out the whole cycle month by month.
Guarding the colony is part of the same job
Monitoring and protection aren’t really separate tasks out on the breakwater; they happen in the same shift. The same volunteers doing counts and weight checks are also the ones asking someone to put their dog back on a lead, explaining why a torch or camera flash needs to go off, or steering a visitor away from climbing onto the rubble to get a closer photo.
This matters because the threats to this colony aren’t exotic. They’re mundane and repeated: off-leash dogs, discarded fishing line and marine plastic, boat strike in the harbour, and artificial light disrupting the penguins’ night return under cover of darkness. None of that is a single dramatic event — it’s cumulative pressure on a small population squeezed onto a human-built rock wall next to one of the busiest stretches of water in Melbourne. Add foxes and cats prowling the foreshore, a real risk for any mainland colony, and you get a sense of why the volunteer presence has to be constant rather than occasional. We’ve written more on that specific predation risk in our piece on why foxes and cats still threaten the colony.
If I’m being blunt about it, I think the protective side of the role is underrated by people who assume “monitoring” just means clipboards and counting. In practice a decent chunk of a shift is spent quietly managing human behaviour, which is arguably harder than handling the birds.
What the data is actually used for
None of this counting happens for its own sake. Population counts, banding returns and weight trends feed into the broader conservation and research approach for the colony, helping identify whether numbers are holding steady, whether a particular breeding season was unusually poor, and whether specific interventions — say, foreshore light shielding or litter removal — are having any measurable effect. You can read more about how those pieces fit together in our conservation and research strategy page.
It also means the “citizen scientist” side of this isn’t decorative. Members of the public who come along on guided nights and report banded birds, unusual behaviour, or entanglement sightings are genuinely adding to the record. We cover how to get involved in more detail in how citizen scientists help protect the colony, and if you’re planning your own visit and want to understand how guided viewing actually runs on the ground, our guide to volunteer-guided viewing at the breakwater is the place to start.
Why this kind of quiet, long-run data is rare
Most published research on little penguins comes from larger, more remote colonies where researchers can spend extended field seasons without dealing with joggers, dog walkers and pier traffic. Zoos Victoria’s own work on the species, and the broader population data collated by BirdLife Australia, both draw on exactly this kind of fine-grained banding and monitoring effort to understand how the species is faring more broadly across southern Australia. St Kilda’s colony is unusual precisely because it sits inside a major city and still has this level of sustained attention on it — a nearly forty-year run of records from a rock wall about seven kilometres from the CBD is not something you’d expect to find, and yet here it is.
Whether that scale of effort is sustainable indefinitely on a volunteer basis is a fair question, and one I don’t think anyone involved would pretend has an easy answer. But the alternative — an urban colony with no data at all — would leave everyone flying blind exactly when a decision about foreshore lighting, boat traffic or predator control needed real evidence behind it.
Next time you’re at the rail waiting for that first grey shape to appear between the rocks, have a look for the volunteer with the clipboard a little further down the wall. They’re doing the part of the job that never makes it into anyone’s photos.
