IBA Criteria Category 1

Sites regularly holding significant numbers of an endangered, threatened, vulnerable, or declining species.

Sites that regularly support significant numbers of one or more of the following breeding or nonbreeding species listed as endangered, threatened, or of special concern in the state of Massachusetts. These include breeding, wintering, or migratory areas. The site should be one of regular and/or recent occurrence (in the past ten years). Thresholds will vary and may include sites with 1% of the state population (if known) in a season, or represent one of the three to five sites in the state with the highest regularly occurring numbers. The site holds a significant number of individuals classified as:

Federally Endangered or Threatened

(1% or more of state population)
Endangered - Roseate Tern
Threatened - Bald Eagle & Piping Plover
Delisted - Peregrine Falcon

State-Endangered, Threatened, or of Special Concern

(1% or more of state population)

Endangered	Threatened	Special Concern
Pied-billed Grebe	Northern Harrier	Common Loon
Leach’s Storm-Petrel	King Rail	Sharp-shinned Hawk
American Bittern	Northern Parula	Common Moorhen
Least Bittern	Vesper Sparrow	Common Tern
Upland Sandpiper	Grasshopper Sparrow	Arctic Tern
Short-eared Owl	Least Tern
Loggerhead Shrike	Barn Owl
Sedge Wren	Long-eared Owl
Golden-winged Warbler	Blackpoll Warbler
Henslow’s Sparrow	Mourning Warbler

For more information on state and national population trends or these species, go to the Breeding Bird Survey Data.