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Michigan 1983-1988

Methods


General Methods
Sampling & coverage of blocks

Michigan was divided into approximately 6mi x 6 mi townships based on the township/range system. Each township was further divided into four 3mi x 3mi blocks. All blocks in the southern Lower Peninsula, 2 of 4 blocks per township in the northern Lower Peninsula, and 1 of 4 blocks per township in the Upper Peninsula, or 4301 of the total of 7080 blocks, were designated as priority blocks. A total of 6116 blocks, including most of the priority blocks and some non-priority blocks, were sampled.


View blocks in the Mapping Tool >>

Coordination of coverage
Management of this project was accomplished with the help of coordinators in 26 regions.

Breeding Evidence Codes
Code Code description  (see handbook for full description & use suggestions)
OB Category - Observed: not breeding evidence
O Species (male or female) observed during its breeding season, but not believed to be breeding in the block. Not in suitable nesting habitat.
PO Category - possible breeding evidence
# Species (male or female) observed in suitable nesting habitat during its breeding season.
X Singing male present in suitable nesting habitat during its breeding season.
PR Category - probable breeding evidence
M 7 or more singing males of a species observed in suitable nesting habitat during their breeding season.
P Pair observed in suitable nesting habitat during its breeding season.
T Permanent territory presumed through either defense (e.g. chasing of other birds) or song at same location on at least 2 occasions 7 days or more apart.
C Courtship behavior or copulation.
N Visiting probable nest site.
A Agitated behavior or anxiety calls from adult.
B Nest building by wrens or excavation of holes by woodpeckers.
CO Category - confirmed evidence of breeding
NB Nest building 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 nests or egg shells found. Must be carefully identified, if they are to be accepted.
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.
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.
AY Attending young: adult carrying fecal sac or food for young, or feeding recently fledged young.
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).
U.S. Department of the Interior || U.S. Geological Survey || Patuxent Wildlife Research Center  Laurel, MD, USA 20708-4038
This site is: http://www.pwrc.usgs.gov/bba
Information contained in this application does not necessarily have the endorsement of USGS.
Contact: mwimer@usgs.gov

Last updated: Site - May 2014; Content - various, depending on atlas.
Page generated on: 25-Oct-2014