Legend and Other Resources
The legend below provides a description each layer, and a link to its source when available.
A Note on Bald Eagles: Bald Eagles are no longer listed under the State or Federal Endangered Species Acts but are still protected under several federal laws. For more information on these please visit: State of Maine Bald Eagle Recovery as well as the State of Maine Bald Eagle Recovery Story Map
Locator Information
City/Township: For more information please visit: State of Maine GIS Catalog
State of Maine Parcels: For more information please visit: State of Maine GIS Catalog
Developed Land /Impervious Surfaces: Impervious surfaces including buildings and roads.
Drainage Divides: These are the smallest hydrologic units mapped in Maine.
They contain watershed boundaries for most ponds and rivers in Maine based on USGS 1:24,000 scale topography.
Physical Natural Resources
National Wetlands Inventory Wetlands: National Wetlands Inventory (NW I) uses aerial photographs to
approximate wetland locations. NW I data is not a comprehensive mapping of
wetland resources and typically under represents the presence of wetlands on
the landscape. The presence of wetlands needs to be determined in the field
prior to conducting activities that could result in wetland disturbance. The US Fish and Wildlife Service (FWS) is the principal US Federal agency tasked with providing information to the public on the status and trends of our Nation's wetlands. For more information please visit: USFW Wetlands
Aquifers: An underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt). For more information please visit: State of Maine Aquifers
Wildlife Habitats
Rare, Threatened, or Endangered Wildlife/State Listed Animal Habitats: Known rare, threatened, or endangered species occurrence and/ or the associated habitats. Some species are labeled ‘rare species’ to protect them from collection. For more information please visit: State of Maine Endangered Wildlife
Essential Wildlife Habitats:
These areas currently or historically providing physical or biological features essential to the conservation of an endangered or threatened species in Maine and which may require special management considerations. These areas focus on coastal wetlands and sand dune systems that are utilized by species such as Roseate Terns, Piping Plovers and Least Terns. These areas are used for nesting, feeding and brood rearing and are essential to conserving endangered or threatened species. As required under the Maine Endangered Species Act, a state agency or municipal government shall not permit, license, fund or carry out projects that will significantly alter an Essential Habitat or violate protection guidelines adopted for the habitat. Landowners, project planners, municipalities or state agencies considering a project in or near an Essential Habitat should contact an MDIFW Regional Wildlife Biologist for assistance. For more information please visit: State of Maine IF&W
Significant Wildlife Habitats
Deer Wintering Habitat:
This dataset contains deer wintering areas (DWAs) in organized townships that qualify as Significant Wildlife Habitat under Maine's Natural Resources Protection Act as mapped by Maine Department of Inland Fisheries and Wildlife Regional Biologists. For more information please visit: State of Maine
Significant Vernal Pools:
A pool depression used for breeding by amphibians and other indicator species and that portion of the critical terrestrial habitat within 250’ of the spring or fall highwater mark. For more information please visit: State of Maine Environmental Review or State of Maine NRPA
Inland Waterfowl / Wading Bird Habitat (IWWH):
Moderate and High value Inland Waterfowl/Wading bird Habitats (IWWHs) are defined under Maine’s Natural Resources Protection Act (NRPA) based on the composition of wetland types, habitat diversity, size, percent open water, and habitat interspersion. The individual scores of these 5 characteristics are summed and the total score used to assign the rating based on thresholds that result in a relatively small number of Highs (the “best of the best”; about 5% of all wetlands in Maine) versus a larger proportion of Moderates (25% of all wetlands). High has some combination of the 5 characteristics that make it better habitat for inland waterfowl and wading birds and results in a score that exceeds the minimum threshold for a High. For more information please visit: State of Maine IWWH or State of Maine NRPA
Tidal Waterfowl / Wading Bird Habitat (TWWH):
Tidal Waterfowl/Wading Bird habitats include aquatic beds, eelgrass, emergent wetlands, mudflats, seaweed communities, and reefs. For more information please visit: State of Maine Environmental Review or State of Maine NRPA
Seabird Nesting Island:
An island, ledge, or portion thereof in tidal waters with documented, nesting seabirds or suitable nesting habitat for endangered seabirds. For more information please visit: State of Maine Seabirds or Contact a Biologist
Shorebird Areas:
Coastal staging areas that provide feeding habitat like tidal mud flats or roosting habitat like gravel bars or sand pits for migrating shorebirds. For more information please visit: State of Maine Shorebirds or Contact a Biologist
Shellfish Beds: Vital shellfish resources near streams and shoreline areas.
** This map data is not to be used for legal determination of open/closed status. For current shellfish closures, consult State of Maine DMRFor more information about classification of shellfish flats, visit: State of Maine DMR Classification
Aquatic Species and Habitats
Wild Brook Trout Habitat: Avoid disturbing habitat within 100 feet of Brook Trout habitat; if riparian areas within that zone are cleared or degraded, than restoring the riparian area to natural tree cover is also recommended. These areas may also be candidates for instream habitat restoration and/or stream connectivity enhancement. Consult with MDIFW Regional Fisheries Biologists or the Native Fish Conservation Biologist for further guidance. For more information please visit: State of Maine IF&W
Atlantic Salmon Habitat: Developed from field surveys conducted on the mainstem and selected tributaries of the Aroostook, Dennys, Ducktap, East Machias, Kennebec, Machias, Passagassawakeag, Penobscot, Pleasant, Presumpscot, Saco, Sheepscot, St. George, Tunk and Union Rivers in Maine by staff of the Maine Dept. of Marine Resources. For more information please visit: Atlantic Salmon Restoration
Riparian Habitat:Shoreline habitat depicted using common regulatory zones, including a 250-foot-wide strip around Great Ponds (ponds 10 acres in size and greater), rivers, coastline, and wetlands 10 acres in size and greater; and a 75-foot-wide strip around streams. Riparian areas depicted on this map may already be affected by existing land uses. Resource agencies may provide buffer recommendations based on specific habitat values and which may differ from planning-level information represented herein. For example, MDIFW generally recommends maintaining 100-foot undisturbed, forested buffers from the upland edge of all intermittent and perennial streams and any contiguous wetlands.
Plants and Natural Communities
*Rare Plants and Natural Communities: Known rare, threatened, or endangered plant occurrences based on field observations.
Some species are labeled ‘rare species’ to protect them from collection. For more information visit:MNAP Rare Plants
*Exemplary Natural Communities: 129 different habitat types that occur in Maine, including floodplain forests, coastal bogs, alpine summits, and many others. Each type is assigned a rarity rank of 1 (Critically Imperiled) through 5 (Demonstrably Common). For more information please visit: MNAP Natural Communities and Ecosystems
*Maine Natural Areas Program rare plant and natural community features are not displayed in the unorganized territories. Please Contact MNAP to access this data.
Conservation and Connectivity Planning Resources
Undeveloped
Habitat Blocks: Remaining land outside
of Development Buffers. Blocks greater than 100 acres are labeled with their
estimated acreage.
Approximate Road Crossing Riparian Habitat Connections
Represented
habitat connections identified through computer modeling highlight locations
where quality habitat is likely to occur on both sides of a given road between
undeveloped habitat blocks greater than 100 acres and between higher value
wetlands. These representations are approximate and have not been field
verified.
Undeveloped Block Connectors: Likely road crossing areas linking undeveloped habitat blocks
greater than 100 acres. The threat of habitat fragmentation and animal
mortality corresponds to traffic volume.
Yellow lines
and arrows represent habitat road
crossings with daily traffic volumes less than 2000 vehicles per day.
Red lines
and arrows represent habitat road
crossings with daily traffic volumes greater than 2000 vehicles per day.
Riparian
Connectors: Likely crossing locations
for wetland dependent species moving between waterways and wetlands divided by
roads.
Blue lines
and arrows represent riparian road
crossings with daily traffic volumes less than 2000 vehicles per day.
Purple lines
and arrows represent riparian road
crossings with daily traffic volumes greater than 2000 vehicles per day.
Highway
Bridge Connectors: Bridges along I-95
and I-295 that span riparian habitat connecting adjacent but separated habitat
blocks. These are locations where species are likely to take advantage of
infrastructure to move between habitat blocks.
Conserved Lands
The State of Maine’s conserved lands
database includes lands in federal, state, and nonprofit ownership. Some privately
owned conservation lands may not be represented. For the most accurate and
current information about land ownership, consult with the local assessor
and/or other local land management agencies. If public access potential to any
of the properties displayed here is uncertain, landowners should be contacted first
to determine if permission is necessary.
Maine Conserved Lands: State of Maine Conserved Lands. For more information please visit: State of Maine Conservation Lands
*Focus Areas of Statewide Ecological
Significance:
Beginning with Habitat Focus Areas of Statewide Ecological Significance are areas to prioritize collaborative,
non-regulatory conservation actions that benefit biodiversity in Maine. Focus Areas were mapped to highlight natural areas
of statewide biodiversity importance and contain high concentrations of at-risk species and habitats. Though Focus Areas
occupy only about 11.5% of Maine's land area, collectively they include examples of over 85% of rare, threatened, and
endangered plant and animal species and high-quality examples of all natural community types. For more information, see
website: State of Maine Focus Areas.
*Only Focus Areas overlapping organized towns are displayed. Please contact Beginning with Habitat through our online request form for information about Focus Areas in unorganized townships.