Delaware Bay Estuary Project
Northeast Region
 

Gap Analysis Resources and Examples

This map depicts rare bird species richness hotspots.  Each hotspot is expected to support a relatively large number of rare bird species, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Bird Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here for full size map.

rare bird hotspot map

This map depicts rare Amphibian species richness hotspots within Status 4 Lands.  Status 4 Lands are defined as those lands which lack an irrevocable easement or mandate to prevent conversion of natural habitats to anthropogenic uses.  Intensive use throughout the tract is allowed.  In other words, the natural habitats on these lands are not protected.  Each hotspot is expected to support a relatively large number of rare amphibian species, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Amphibian Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here for full size map.

rare amphibian hotspot map

This map depicts rare Bird species richness hotspots within Status 4 Lands.  Status 4 Lands are defined as those lands which lack an irrevocable easement or mandate to prevent conversion of natural habitats to anthropogenic uses.  Intensive use throughout the tract is allowed.  In other words, the natural habitats on these lands are not protected.  Each hotspot is expected to support a relatively large number of rare bird species, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Bird Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here for full size map.

rare bird hotspot map

This map depicts rare Reptile species richness hotspots within Status 4 Lands.  Status 4 Lands are defined as those lands which lack an irrevocable easement or mandate to prevent conversion of natural habitats to anthropogenic uses.  Intensive use throughout the tract is allowed.  In other words, the natural habitats on these lands are not protected.  Each hotspot is expected to support a relatively large number of rare reptile species, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Reptile Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here to view full size map.

rare reptile hotspot map

This map depicts rare vertebrate species (birds, mammals, reptiles and amphibians) richness hotspots within Status 4 Lands.  Status 4 Lands are defined as those lands which lack an irrevocable easement or mandate to prevent conversion of natural habitats to anthropogenic uses.  Intensive use throughout the tract is allowed.  In other words, the natural habitats on these lands are not protected.  Each hotspot is expected to support a relatively large number of rare species, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here to view full size map.

rare vertibrate hotspot map

This map depicts rare amphibian species richness, or the total number of rare amphibian species predicted to occur in a given area, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Amphibian Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here to view full size map.

rare amphibian species richness

This map depicts rare reptile species richness, or the total number of rare reptile species predicted to occur in a given area, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Reptile Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here to view full size map.

rare reptile species richness map

This map depicts rare bird species richness, or the total number of rare bird species predicted to occur in a given area, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Bird Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here to view full size map.

rare bird richness hotspot map

This map depicts rare vertebrate species (birds, mammals, reptiles and amphibians) richness, or the total number of rare vertebrate species predicted to occur in a given area, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range. Rare Species include those species which are 1) Rare within a State (S3; typically 21 to 100 known occurrences), 2) Very Rare within a State (S2; typically 6 to 20 known occurrences), or 3) Extremely Rare within a State (S1; typically 5 or fewer known occurrences), as defined by State Natural Heritage Programs.  Also included are State-listed and Federally-listed Threatened and Endangered Species.

Click here to view full size map.

rare vertebrate richness map

This map depicts vertebrate species (birds, mammals, reptiles and amphibians) richness, or the total number of vertebrate species predicted to occur in a given area, based on predictive habitat modeling.  The modeling identifies suitable habitat for a species, based on its known habitat preferences, within its documented geographic range.

Click here to view full size map.

all vert richness map

These excel spread sheets represent individual taxa status in Maryland, Delaware, and New Jersey.

Rare Amphibians

Rare Birds

Rare Mammals

Rare Reptiles

Last updated: July 18, 2012

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