New Brunswick’s spring migration is a genuinely spectacular event that most locals walk right past. The Saint John River floodplain, the hardwood ridges of Mactaquac, and the quiet backwaters near Killarney Lake are all coming alive right now — with birds, mammals, and amphibians making their presence unmistakable for anyone willing to slow down and look.
What makes this window — roughly mid-April through mid-May — so productive is the overlap of events. Migrant birds are arriving from the south. Resident mammals are emerging from winter torpor, hungry and active at all hours. Amphibians are breeding in every wet area in the city. And the leaves haven’t filled in yet, meaning sightlines into the forest are still long and clear.
The river itself is worth watching closely. The spring freshet has crested, and as water levels stabilize, fish begin moving — which draws everything that eats fish. A pair of binoculars and an hour on a bench above the Saint John can be genuinely astonishing in the last week of April.
Spring in New Brunswick is brief and changeable. A warm week can push everything forward by two weeks; a cold snap can send the warblers back into hiding. The best approach is simply to get out now, regularly, and stay curious. The wildlife is not hard to find. It is already everywhere.
