Few local animals have a family and social life as deep as geese do — and the ones living here year-round have a backstory that’s easy to miss entirely.

Canada geese can be found at Edgemont Park and sometimes at Yantacaw. Their bonds are among the strongest and longest-lasting in the bird world, and many of the geese living here don’t actually migrate because of a decision people made nearly a century ago, not because of any choice of their own.

What they look like

Canada geese are large waterfowl with a black head and neck marked by a distinctive white “chinstrap,” a brown body, and a black tail. Males (ganders) are typically larger than females (geese) and stand taller as sentries, but the two sexes otherwise look alike. In flight, geese are known for the V-formation skein, which reduces drag for birds flying behind the leader and lets them communicate position with their calls.

A bond that lasts a lifetime

Geese choose a mate through an extended courtship — mutual head-dipping, synchronized swimming, and loud calling together once a pair forms — and most don’t pair up until their second or third year. Once bonded, a pair mates for life, staying together year-round rather than only during breeding season, for a lifespan that can run 10 to 25 years in the wild.

That bond isn’t just sentimental; it’s functional. Research on Canada geese and related species has found that established pairs raise more goslings successfully than new pairs, with reproductive success climbing for years as partners grow more attuned to each other — coordinating defense, sharing knowledge of the best feeding and nesting sites, and dividing incubation and guard duties efficiently. A related study on greylag geese found a mate’s presence measurably lowers a goose’s stress response, with heart rate dropping when a partner is nearby and rising when they’re separated.

When a pair is reunited after even a brief separation, geese perform an elaborate greeting display — loud honking, head-rolling, and wing-flapping — that researchers believe helps reinforce the bond. And when a mate is lost, the surviving goose often shows visible signs of grief: calling for the missing partner, becoming withdrawn, and in some documented cases losing the alertness that normally keeps geese safe from predators and hazards. Some geese do eventually re-pair, particularly younger birds, but the loss of a lifelong mate is not something they simply move past overnight.

Two kinds of geese, and how the residents got here

Not every Canada goose you see in Montclair is the same kind of goose, and understanding the difference explains a lot about what people notice through the year. Some are migratory geese, passing through on long journeys between breeding grounds in northern Canada — Labrador, Newfoundland, northern Quebec — and wintering grounds farther south, using local ponds as brief stopovers rather than homes. Others are resident geese, who nest here, raise their young here, and stay in the area all year.

The reason resident geese exist at all traces back to a hunting practice, and to the law that ended it. For decades, into the early 20th century, hunters legally kept flocks of live Canada geese as decoys — often with one wing pinioned, a tendon cut so the bird physically could not fly, so it would stay put and call in wild geese for hunters to shoot. These birds spent their entire lives grounded and captive, with no flock, no migratory route, and in many cases no ability to fly at all. In 1935, live-decoy hunting was outlawed. Thousands of these captive geese — suddenly legal to have but no longer useful to keep — were released or given away to parks, farms, and private landowners almost overnight.

That’s the piece that explains why resident geese don’t fly south: they simply never had the chance to learn how. Migration in geese isn’t instinctual, the way it is in some other animals — it’s a route and a habit passed down from parents to goslings, generation after generation, learned by following the flock. A grounded decoy goose released in 1935 had no such flock to follow and no wild parent to teach a route. It settled wherever it landed, nested there, and passed that same rootedness on to its own goslings, who had just as little reason to leave as their parents did. Multiply that across thousands of released birds and eighty-plus years of descendants, and the outcome is the year-round population living on local ponds today.

It’s worth sitting with what that means. The “too many geese” complaint aimed at resident flocks is really a complaint about a situation people created. These birds didn’t choose to stop migrating, and their descendants didn’t inherit some flaw — they inherited the literal absence of a skill that was taken from their ancestors by a hunting practice and then never available to relearn. The resident geese grazing at Edgemont Park at times are doing what every generation before them has done since 1935: staying exactly where they were put.

However, Montclair enacted a humane geese management program in 2020 that safely chases geese from the park and greatly minimizes the chances of nests being built at all.

Why you see more geese in fall

The seasonal swings people notice in flock size come down to the migratory geese passing through, not the residents. Migrants headed south begin arriving in this region in early fall, with numbers building through October, November, and into December as different waves move through, temporarily swelling local flocks well beyond the resident population. Those birds don’t stay: by winter they continue on, and migration continues into spring as the same geese head back north to nest in the Arctic and sub-Arctic, well outside New Jersey.

Family life

Nesting season runs roughly February through April. The female builds the nest, typically on the ground near water and often on a small island or peninsula that offers a clear sightline against predators, and lays a clutch of about four to seven eggs. She does almost all of the incubating, while the gander stands guard nearby, aggressively defending the nest against anything that gets too close — the source of most goose-versus-human conflicts each spring.

Goslings hatch already covered in down and able to walk, swim, and feed themselves within a day, but they stay under close parental supervision for much longer. Goose families stay together as a unit well past hatching, with goslings not becoming fully independent until close to a year old. Extended family groups, including grown offspring from previous years, are common within the same flock — and for resident geese, that whole extended family may spend its entire life on the same handful of local ponds.

Geese are grounded through the summer while the adults’ wings are molting and the young are not yet ready to fly. Come September, most will take off. However, again, in Montclair due to our humane approach the chance of nesting is minimal if at all. A nest has not been built at Yantacaw in over 5 years.

Daily habits

Geese are grazers, feeding mainly on grasses, grains, and aquatic vegetation, which is why they’re drawn to mowed lawns, athletic fields, and golf courses as much as to ponds. They’re most active during the day and often move between a roosting body of water and nearby feeding areas on a predictable daily schedule. Outside of breeding season, geese are highly social and gather in large flocks, often made up of related family groups that have stuck together across years.

Living alongside geese

• Expect defensiveness near nests in spring. A goose hissing or charging is a parent protecting eggs or goslings, not random aggression — giving the nest a wide berth resolves it.
• Don’t feed them. Bread and similar handouts are poor nutrition for geese and encourage flocks to concentrate unnaturally in one spot, worsening the droppings and conflict that usually drive complaints.
• Let a family cross in its own time. A parent leading goslings across a road or path is following a route it knows; waiting them out is safer and faster than trying to redirect them.
• Recognize a lone, agitated goose. A goose that won’t leave a spot and appears to be calling repeatedly may be searching for a mate or gosling that’s been separated — a sign of the same bond that makes geese such attentive parents.
• Remember why the residents stay. Year-round geese in town aren’t behaving badly. They’re descended from birds that a hunting practice, and the 1935 law that ended it, left with no migratory tradition to pass on.

Few backyard encounters carry as much unseen history as a goose flock grazing on a lawn — very possibly the same handful of long-mated pairs and their extended families, still living out the consequences of a hunting practice ended nearly a century ago, on the same familiar ground year after year.