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Massachusetts 1974-1979


General Methods
Sampling & coverage of blocks

Each block consisted of 1/6 of a USGS 7.5 minute topographic quad. Coverage was complete, and all 969 blocks in 189 quads were sampled.

View blocks in the Mapping Tool >>

Coordination of coverage
Approximately 75 quad coordinators acted as liaisons between atlasers and the project coordinator.

Breeding Evidence Codes
Code Code description  (see handbook for full description & use suggestions)
PO Category - possible breeding evidence
v Species (male or female) observed in its breeding season in suitable nesting habitat, with no other indication of breeding noted.
PR Category - probable breeding evidence
S Singing male present (or breeding calls heard) on more than one date in the same place.
T Bird (or pair) apparently holding territory.
D Courtship and display, or agitated behavior or anxiety calls from adults suggesting probable presence of nest or young nearby; brood patch on trapped female or cloacal protuberance on trapped male.
N Visiting probable nest site.
B Nest building by wrens or excavation of holes by woodpeckers.
CO Category - confirmed evidence of breeding
DD Distraction display or injury feigning; coition.
NB Nest building by any species except wrens and woodpeckers.
UN Used nest found. Must be carefully identified if it is to be accepted.
FE Female with egg in oviduct. (For banders.)
FL Recently fledged young.
FS Adult carrying fecal sac.
FY Adult(s) entering or leaving nest site in circumstance indicating occupied nest.
NE Nest with egg(s), undisturbed nest with a bird in incubation posture, or eggshells found below nest.
NY Nest with young or downy young of waterfowl, quail, waders, etc.
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).
U.S. Department of the Interior || U.S. Geological Survey || Patuxent Wildlife Research Center  Laurel, MD, USA 20708-4038
This site is:
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: 18-Jan-2018