GAP Analysis Program

GAP Logo
[Copyright: GAP Analysis Program]

The GAP Analysis Program provides state, regional and national conservation assessments of native vertebrate species and natural land cover types in the United States. This information is used to identify those species and plant communities that are not adequately represented on existing conservation lands. Land cover data and maps of predicted bird species distribution are available for download or online viewing by following this link. The GAP Analysis Program is a contributing component of the NBII.

Monitoring Avian Productivity and Survivorship (MAPS) Program

Yellow-rumped warbler
Data being taken on a Yellow-rumped Warbler (Dendroica coronata)
as part of the MAPS Program
[Photograph: Gwen Baluss]

The Monitoring Avian Productivity and Survivorship (MAPS) Program was created by the Institute for Bird Populations in 1989 to assess and monitor the vital rates and population dynamics of over 120 species of North American landbirds. It utilizes constant-effort mist netting and banding at a continent-wide network of monitoring stations to collect data and provide demographic estimates for bird populations. NBII contributed to this effort by supporting development of the MAPS online data summaries and the data retrieval interface.

Maps and Data

Online accessibility to data and maps is increasing our capacity to effectively support the decision-making process ultimately leading to conservation action. By decreasing the time it takes to discover and acquire needed data, Internet technologies are accelerating the creation of knowledge and its transfer to decision makers. These pages highlight some of the projects supported by NBII to improve access to bird-related data. A complete list of NBII Bird Conservation Node-supported projects is found on the Supported Projects web page. Additional data and GIS resources relevant to the conservation of birds and their habitats can be accessed via the Bird Data and Maps & GIS Data pages.

black-necked stilts

Bird Data
Find projects that provide game and non-game bird population data used to assess status, trend, productivity and survivorship, and data used to determine bird distribution and abundance.

magnolia map

Maps & GIS Data
Explore projects that provide access to maps and/or use interactive mapping applications to display habitat information, bird distribution, collection locations, and data summaries in a spatial context.

The Breeding Bird Atlas Explorer

Breeding Bird Atlas Explorer logo The Breeding Bird Atlas Explorer is maintained by the USGS Patuxent Wildlife Research Center and provides searchable data from Breeding Bird Atlases in North America. Data are used to assess the status of breeding populations of nongame birds at the state level. For the past few years, NBII funding has supported a growing list of states participating and incorporating their data into the Breeding Bird Atlas Explorer.

Migratory Bird Data Center

Migratory Bird Data Center

The Migratory Bird Data Center provides access to bird population and harvest databases (listed below) maintained by the U.S. Fish & Wildlife Service and the U.S. Geological Survey at Patuxent Wildlife Research Center. NBII supported the creation of this website and the development of search & data entry tools for the various databases.

  • Bird Point Count Database
  • North American Breeding Bird Survey
  • Atlantic Flyway Breeding Waterfowl Survey
  • Atlantic Flyway Sea Duck Survey
  • Mid-winter Waterfowl Survey
  • Mexican Mid-winter Waterfowl Survey
  • Waterfowl Breeding Population & Habitat Survey
  • American Woodcock Singing-ground Survey
  • Mourning Dove Call-count Survey
  • Duck Stamp Sales Database

Midwinter Bald Eagle Count

Bald Eagle
Bald Eagle (Haliaeetus leucocephalus)
[Photograph: Dave Menke, U.S. Fish and Wildlife Service]

The Midwinter Bald Eagle Count database houses the results of Midwinter Bald Eagle Surveys conducted each January from 1986-2005 along 746 routes in 43 states. These data are available online via a website, where users can access raw count data and summary information (trends, means, high and low counts) for survey routes. NBII funding has supported development and maintenance of this website.


Sage Grouse
Sage-grouse (Centrocercus urophasianus)
[Photograph: Karen Steenhof,
USGS Snake River Field Station]

SAGEMAP is a portal for spatial data used in research and management of sage grouse and sagebrush steppe habitats in the western United States. It provides data encompassing the historical extent of sage grouse distribution in the Intermountain West. These data are used by state and federal agencies to develop an objective assessment of the current status of sage grouse populations and their habitats across the region. SAGEMAP is a project supported by the U.S. Geological Survey and NBII.

The NBII Program is administered by the Biological Informatics Program of the U.S. Geological Survey
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