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Yolo Co. (CA) 2008-2014


General Methods
Sampling & coverage of blocks

Coordination of coverage

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 in a block during the breeding season, but no evidence or breeding observed. Not in suitable nest habitiat. Includes a wide range of species, such as vultures or raptors, or a colonial nesting species not at the nesting colony.
PO Category - possible breeding evidence
X Species (male or female) observed in suitable habitat during its breeding season. Singing male present in suitable nesting habitat during its breeding season; bird(s) present in suitable breeding habitat within the breeding season.
PR Category - probable breeding evidence
P Pair observed in suitable habitat during its breeding season. For species like Acorn Woodpecker that breed in groups, at least one of each sex within an apparent territorial group. Not used for hummingbirds.
S Permanent territory presumed through song at same location on at least 2 occasions 7 days or more apart.
M Multiple males – seven singing males of the same species singing on territory within a block on a single visit and only for specified resident species that have distinctive territorial songs, or for migratory species with territorial songs only between the “safe dates of 15 May through 15 July.
T Permanent territory presumed through defense of territory (e.g. chasing individuals of the same species).
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
CN Bird carrying nesting material, such as sticks or other material. Please submit full details including location within the block of the observation.
NB Nest building at the actual nest site.
PE Physiological evidence of breeding (e.g., highly vascularized, edematous incubation [brood] patch or egg in oviduct based on bird in hand. To be used by experienced bird banders on local birds during the breeding season).
DD Distraction display or injury feigning.
UN Used nests or eggshells found. Caution: these must be carefully identified if they are to be accepted.
PY Precocial young. Flightless young of precocial species restricted to the natal area by dependence on adults or limited ability.
FL Recently fledged young (either precocial or altricial) incapable of sustained flight, restricted to natal area by dependence on adults or limited mobility.
ON Occupied nest: adults entering or leaving a nest site in circumstances indicating an occupied nest. To be used for nests that are too high (e.g., the tops of trees) ore enclosed (e.g., chimneys) for the contents to be seen.
CF Adult carrying food for young.
FY Adult feeding recently fledged young.
FS Adult carrying fecal sac.
NE Nest with egg(s). Note: presence of cowbird eggs or young is confirmation of both cowbird and host species.
NY Nest with young seen and heard. Note: presence of cowbird eggs or young is confirmation of both cowbird and host species.
Habitat Codes
Habitat code Description (9 habitats defined)
AA Agriculture annual crops (group)
AH Agriculture homestead (group)
AP Agriculture perennial crops (group)
Ch Chaparral (group)
FW Foothill woodland (group)
HH Human habitations (group)
MA Marshes (group)
RW Riparian woodland (group)
SF Savannah/Grassland (group)

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
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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-Oct-2018