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Methods
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Sampling & coverage
of blocks |
Each block consists of 1/6 of a USGS 7.5 minute topographic quad.
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Coordination of coverage |
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Code |
Code description
(see handbook for full description & use suggestions) |
OB Category - Observed: not breeding evidence
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E |
Observed outside of safe dates, not exhibiting breeding behavior. |
O |
Observed within safe dates, not in breeding habitat. |
PO Category - possible breeding evidence
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X |
Heard or seen in breeding habitat within safe dates. |
PR Category - probable breeding evidence
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A |
Agitated behavior or anxiety calls from adult. |
P |
Pair seen within safe dates. |
T |
Bird holding territory (counter-singing, chasing, etc.). |
C |
Courtship behavior or copulation. |
N |
Visiting probable nest site. |
B |
Adult wrens or woodpeckers carrying nesting material or nest building. |
M |
A species is observed or heard (in suitable habitat during the breeding season) at 7 or more stops along a miniroute. |
CO Category - confirmed evidence of breeding
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NB |
Adult carrying nesting material or nest building (except wrens and woodpeckers). |
DD |
Distraction display. |
UN |
Used nest or eggshells found. |
FL |
Recently fledged young. |
CF |
Parent carrying food, feeding young, or removing fecal sac. |
RC |
Raptor performing a courting display or repeatedly carrying food to a specific area. |
ON |
Parents leaving/entering nest site or on nest. |
NE |
Nest with egg(s). |
NY |
Nest with young seen or heard. |
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- - this atlas does not record habitat on the field card - -
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Most of the information on this page is from
the project's publication or Handbook
(guide for field work).
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