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Massachusetts 2007-2011 (published!)


General Methods
Sampling & coverage of blocks

Each block consists of 1/6 of a USGS 7.5 minute topographic quad. All blocks are planned to be sampled to at least a minimum threshold.

View blocks in the Mapping Tool >>

Coordination of coverage
This project is being managed with the help of coordinators in 7 regions. Each coorination region consists of one to many counties.

Breeding Evidence Codes
Code Code description  (see handbook for full description & use suggestions)
OB Category - Observed: not breeding evidence
O Species (male or female) known to breed in the state but seen "passing through" (e.g., vultures, nesting gulls), a colonial species observed with no colony found in the block, or a bird seen in unsuitable nesting habitat; all within safe dates.
PO Category - possible breeding evidence
X Species (male or female) seen or heard in suitable nesting habitat within safe dates but no further evidence of breeding is uncovered. This includes a single drumming woodpecker, although the species must be seen to identify the woodpecker.
PR Category - probable breeding evidence
P A pair (male and female together) seen in suitable nesting habitat within safe dates.
S Permanent territory presumed through song, heard at same location on at least 2 occasions (both within safe dates), 7 days or more apart. This can be used for drumming woodpeckers, although the species must be seen to be identify the woodpecker.
T Permanent territory presumed through defense of territory (often a male chasing individuals of the same species) within safe dates.
A Agitated behavior or anxiety calls from adult observed within safe dates. These calls are frequently directed at cats or snakes.
C Courtship behavior or copulation; OK to use outside of safe dates.
N Visiting probable nest site within safe dates.
B Building nests by wrens or excavation of holes by woodpeckers within safe dates.
CO Category - confirmed evidence of breeding
ON Occupied nest. Adult seen sitting on nest and likely incubating eggs or brooding hatchlings. No eggs or young seen.
CN Carrying nesting material such as sticks, grass, bark, etc. Not to be used for wrens, crows, or colonial species for which its colony is not found (e.g., Great Blue Heron).
NB Nest building at the actual nest site by any species except wrens and woodpeckers.
PE Physiological evidence of breeding, e.g. highly vascularized, edematous brood patch or egg in oviduct based on bird in hand. (For banders.)
DD Distraction display or injury feigning.
UN Used nest found. Must be carefully identified if it is to be accepted.
PY Flightless young of precocial species restricted to the natal area by dependance on adults or limited mobility.
FL Recently fledged young (either precocial or altricial) incapable of sustained flight, restricted to natal area by dependence on adults or limited mobility.
CF Adult carrying food for young. Not to be used for crows unless they are seen going into a nest site.
FY Adult feeding recently fledged young.
FS Adult carrying fecal sac.
NE Nest with egg(s).
NY Nest with young seen or heard.
Habitat Codes
- - this atlas does not record habitat on the field card - -

Where this information came from
Most of the information on this page is from the project's publication or Handbook (guide for field work). For this project, the Handbook is also available online here (pdf).
U.S. Department of the Interior || U.S. Geological Survey || Patuxent Wildlife Research Center  Laurel, MD, USA 20708-4038
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Information contained in this application does not necessarily have the endorsement of USGS.

Last updated: Site - May 2014; Content - various, depending on atlas.
Page generated on: 08-Aug-2022