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The Priority Habitats of Rare Species datalayer contains polygons representing the geographic extent of Habitat of state-listed rare species in Massachusetts based on observations documented within the last 25 years in the database of the <\/SPAN><\/SPAN>Natural Heritage & Endangered Species Program<\/SPAN><\/A>(NHESP). Priority Habitat polygons are the filing trigger for project proponents, municipalities, and all others for determining whether or not a proposed project or activity must be reviewed by the NHESP for compliance with the (MESA) and its implementing regulations. Areas delineated as Priority Habitats can include wetlands, uplands, and marine habitats. The Priority Habitats presented here are part of the 14th Edition of the Massachusetts Natural Heritage Atlas, and are effective beginning <\/SPAN>August 1, 2017<\/SPAN><\/SPAN>.<\/SPAN><\/SPAN><\/P>

If your project or activity falls within Priority Habitat and does not meet a MESA filing exemption (321 CMR 10.14), then you must file directly with the NHESP pursuant to MESA. For more information, please see www.mass.gov/dfw/nhesp/regulatory-review.<\/SPAN><\/SPAN><\/P>

The Priority Habitats of Rare Species datalayer is stored in ArcSDE as <\/SPAN><\/SPAN>PRIHAB_POLY<\/SPAN><\/SPAN>.<\/SPAN><\/SPAN><\/P>

Priority Habitats were digitized by NHESP scientists from documented observations of state-listed rare species and are based on such factors as reported species movements and known habitat requirements. The polygons were heads-up digitized in ArcGIS 10x and referenced to <\/SPAN><\/SPAN>MassGIS 2013/14 Color Orthos<\/SPAN><\/SPAN><\/A><\/P>

Occurrence records are continually being added, updated, deleted or otherwise modified in the NHESP database. These changes are incorporated into revisions to the Priority Habitats of Rare Species datalayer every four years.<\/SPAN><\/P>

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