| Code |
Code description
(see handbook for full description & use suggestions) |
|
OB Category - Observed: not breeding evidence
|
| X |
Species (male or female) observed in its breeding season with no evidence of breeding. |
|
PO Category - possible breeding evidence
|
| SH |
Species (male or female) observed in suitable nesting habitat during its breeding season. |
| SM |
Singing male present, or breeding calls heard, in suitable nesting habitat in breeding season. |
|
PR Category - probable breeding evidence
|
| P |
Pair observed in suitable nesting habitat during its breeding season. |
| T |
Permanent territory presumed through registration of territorial behavior (song, etc.) on at least 2 days, 7 days or more appart, at the same place. |
| D |
Courtship of display between a male and a female or 2 males, including courtship feeding or copulation. |
| V |
Visiting probable nest site. |
| A |
Agitated behavior or anxiety calls from adult. |
| B |
Brood patch or cloacal protuberance. |
|
CO Category - confirmed evidence of breeding
|
| N |
Nest building or excavation of a nest hole. |
| DD |
Distraction display or injury feigning. |
| NU |
Used nests or egg shells found. Must be carefully identified, if they are to be accepted. |
| FY |
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. |
| AE |
Adult leaving or entering nest sites in circumstances indicating occupied nest (including high nests, nest holes, or nest boxes, the content of which cannot be seen). |
| FS |
Adults with fecal sac or food for young. |
| NE |
Nest with egg(s). |
| NY |
Nest with young seen or heard. |