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Ohio 1982-1987


General Methods
Sampling & coverage of blocks

Each block consisted of 1/6 of a USGS 7.5 minute topographic quad. A priority block from each quad was randomly chosen from the ones not bordering other priority blocks from adjacent quads. Additional 113 areas of special interest were covered as blocks at the discretion of some participants.

View blocks in the Mapping Tool >>

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

Breeding Evidence Codes
Code Code description  (see handbook for full description & use suggestions)
PO Category - possible breeding evidence
10 Species observed in breeding season in possible nesting habitat but no other indication of breeding noted. (Care should be used not to include migrants or vagrants.)
PR Category - probable breeding evidence
21 Pair observed in suitable nesting habitat during its breeding season.
22 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.
23 Bird (or pair) apparently holding territory. In addition to territorial singing, chasing of other individuals of the same species often marks a territory.
24 Courtship and display, copulation, agitated behavior or anxiety calls from adults suggesting probable presence of nest or young nearby; well-developed brood patch or cloacal protuberance on trapped adults. (For banders.)
25 Visiting probably nest site, or nest building by wrens and woodpeckers.
26 Nest building or excavation of a nest hole.
CO Category - confirmed evidence of breeding
30 7 or more territorial males in a block.
31 Distraction display or injury feigning.
32 Used nest found. Must be carefully identified if it is to be accepted.
33 Female with egg in oviduct. (For banders.)
34 Young recently out of the nest, not yet able to fly. Only for those birds incapable of sustained flight.
35 Adult carrying fecal sac.
36 Adult carrying food for young.
37 Active nest with unidentified contents. To be used when the presence of eggs or young in a nest cannot be determined due to nest location or presence of incubating adults.
38 Identifiable nest and eggs, adult incubating eggs, or egg shells found beneath nest. If you find a cowbird egg in a nest, it is a 38 for the cowbird and a 38 for the nest' owner.
39 Nest with young or identifiable dead nestling. If you find a young cowbird with other young, it is a 39 for both species.
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: 16-Jan-2018