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Vermont 1976-1981


General Methods
Sampling & coverage of blocks

Each block consisted of 1/6 of a USGS 7.5 minute topographic quad. One priority block was randomly selected from each quad. All 179 priority blocks and some non-priority blocks were sampled. 24 unique and fragile areas were also designated and sampled.

View blocks in the Mapping Tool >>

Coordination of coverage
Management of this project was accomplished with the help of regional coordinators.

Breeding Evidence Codes
Code Code description  (see handbook for full description & use suggestions)
PO Category - possible breeding evidence
PO Possible category, code not available
X 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
PR Probable category, code not available
S Singing male present (or breeding calls heard) on more than one date in the same place. A good indication that a bird has taken up residence if the dates are 7 days or more apart.
T Permanent territory presumed through defense of territory (e.g. chasing individuals of the same species).
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
CO Confirmed category, code not available
DD Distraction display or injury feigning.
NB Nest building by any species except wrens and woodpeckers.
UN Used nests or egg shells found. Must be carefully identified, if they are to be accepted.
FE Female with egg in oviduct. (For banders.)
FL Recently fledged young (of altricial species) incapable of sustained flight or downy young (of precocial species) restricted to the natal area by dependance on adults or limited mobility.
FS Adult carrying fecal sac.
FY Adult carrying food for young.
ON Adults entering or leaving a nest site in circumstances indicating occupied nest. To be used for nests which are too high (e.g. the tops of trees) or enclosed (e.g. chimneys) for the contents to be seen.
NE Nest with egg(s), undisturbed nest with a bird in incubation posture, or eggshells found below nest.
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).
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: 20-May-2019