|A great blue heron uses rushes as camouflaage
At the river's edge, adjacent to the shallow marsh west of
the Dealtry Pool in Watertown, painted turtles can often be
seen sunning themselves on logs. Shallow marsh and shrub swamp
habitat is found throughout the upper Reservation. Herons use
the camouflage of rushes and sedges to forage on frogs and
Tall Silver Maple trees provide perch sites for birds such
as cormorants, flycatchers, kingfishers and hawks which hunt
along the river. The expansive tree canopy also provides roosting
areas for colonies of black-crowned night heron.
Hawks, songbirds, foxes, squirrels and other small mammals
inhabit the oak/pine forest habitat characteristic of the Lakes
District in Waltham and Newton. Canada geese, mallards, black
ducks, hooded mergansers, buffleheads and gulls can be seen
all along the river corridor, especially in winter.