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Northern Harrier flying
Northern Harrier © Kyle Wilmarth

Important Bird Area: Brush Island

Map of Brush Island IBA site

Nominated By

David Larson

Size

0.9 acres

Towns and Counties

Cohasset; Plymouth

Ownership

private

Major Habitats

early successional shrubland, coastal beach, marine/tidal

Land Use

undeveloped

Serious Threats

disturbance to birds or habitat

Site Description

Brush Island, located just offshore from Little Harbor in Cohasset, is a rock island that is the site of one of the state's largest Double-crested Cormorant rookeries. It typically supports nesting cormorants and gulls.

Current Conservation Status

There is a potential for recreational boaters to disturb the colony, but there is little likelihood of development.

Ornithological Significance

One of the top four coastal nest sites for Double-crested Comorant (747 pairs, 1994) during the Massachusetts Coastal Colonial Waterbird Inventory, exceeded only by Milk Island (Rockport), Middle Brewster Island (Boston), and Weepecket Island (Gosnold).

Other Flora or Fauna of Significance

None described.

Data Sources

B. Blodget. 1994/1995. Massachusetts Coastal Colonial Waterbird Inventory. Preliminary data, MassWildlife.

Data from a ground-based nest count by Katharine Parsons, Manomet Center for Conservation Sciences.