Boundary Bay Wildlife Conservation Area, Wildlife conservation area in Delta, Canada.

Boundary Bay Wildlife Management Area covers the entire Canadian portion of Boundary Bay, a shallow bay of the Salish Sea on the border with Washington State. Its northeastern part, Mud Bay, is named for its large mudflats, and the area also protects the estuaries of the Serpentine and Nicomekl rivers, which drain into Mud Bay from the northeast.

The protection was established in 1995 by British Columbia's government to safeguard key habitats for migratory birds and marine life. This action came as awareness grew about how critical such places are for species that travel long distances.

This place sits along the Pacific Flyway, a major migration route where birds pass through on their journeys between continents. You can observe how different species arrive and depart with the seasons, making the bay a vital stopping point for rest and feeding.

You can reach the area through Metro Vancouver's regional park, which has public paths along the dikes. The best time to visit for bird watching is during spring and fall migrations, when many species are actively moving through.

The bay's intertidal mudflats and salt marshes also support large stands of sea asparagus and various grasses, a plant community that goes largely unnoticed by visiting birdwatchers. The northeastern Mud Bay section, fed by the Serpentine and Nicomekl estuaries, is the most ecologically productive part of the management area.