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Colorado 1987-1994


General Methods
Sampling & coverage of blocks

Each block consists of 1/6 of a USGS 7.5 minute topographic quad. The south-east (SE) block of each quad was assigned as a priority block. 1745 of 1760 priority blocks, 18 border blocks, and 1006 non-priority blocks were covered in total.

View blocks in the Mapping Tool >>

Coordination of coverage
Management of this project was accomplished with the help of coordinators in 20 regions.

Breeding Evidence Codes
Code Code description  (see handbook for full description & use suggestions)
OB Category - Observed: not breeding evidence
O Migrants and non-breeding species observed in block during breeding season.
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 on one day in suitable nesting habitat.
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.
V Visiting probable nest site.
A Agitated behavior or anxiety calls from adult.
N Nest building by Bald Eagles or excavation of nest holes by wrens and woodpeckers, and construction of dummy nests.
CO Category - confirmed evidence of breeding
NB Nest bulding or adult carrying nesting material.
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.
FY Adult seen carrying food for young, or feeding recently fledged young. Subdivided into CF and FF.
CF Adult carrying food for young (subcategory of FY).
FF Adult feeding fledgling (subcategory of FY).
FS Adult carrying fecal sac.
NE Nest with egg(s).
NY Nest with young seen or heard.
Habitat Codes
Habitat code Description (56 habitats defined)
AEM Emergent wetlands marshes (group)
ASG Salt meadows (group)
ASU Submergent or floating wetlands (group)
CPL Croplands (group)
CWD Cultivated woodlands (group)
FRC Riparian coniferous forest (group)
FRD Riparian deciduous forest (group)
FUC Upland coniferous forest (group)
 FUCD  Upland coniferous - Douglas-fir
 FUCL  Upland coniferous - Lodgepole pine
 FUCM  Upland coniferous - Mixed conifer/aspen woodland
 FUCS  Upland coniferous - Englemann spruce/subalpine fir
FUD Upland deciduous (group)
LRD Lowland riparian (group)
MCL Cliffs (group)
MSC Other Urban/Agricultural (group)
OWL Open water - Lakes (group)
OWS Open water - Streams (group)
RRL Rural (group)
SBC Willow Carr (group)
SBL Burned-over areas (group)
 SBLS  Burned-over areas - Engelman spruce/subalpine fir
SBR Sagebrush (group)
SKR Evergreen shrublands (group)
SLC Lowland Carr (group)
SLS Lowland sagebrush (group)
SMC Montane Carr (group)
SMM Mountain shrublands (group)
SMS Mountain sagebrush (group)
SMT Mat saltbrush (group)
SOS Oak scrub (group)
SSL Logged-over areas (group)
 SSLL  Logged-over areas - Lodgepole pine
 SSLM  Logged-over areas - Mixed conifer/aspen woodland
 SSLS  Logged-over areas - Engelmann spruce/subalpine fir
STD Tall desert shrub (group)
TAL Alpine tundra (group)
TMG Montane grasslands (group)
TMGB Western intermountain grassland (group)
TMGP Midgrass prairie (group)
TMXP Mixed grasses of habitat alteration (group)
TSG Shortgrass prairie (group)
TSU Barren ground (Urban/agricultural) (group)
TTR Tallgrass - Riparian (group)
TTS Tallgrass - Sandsage (group)
UIN Industrial (group)
UPK Parks (group)
URB Residential (group)
WMO Montane woodland (group)
 WMOB  Montane woodland - Bristlecone pine
 WMOD  Montane woodland - Douglas-fir
 WMOL  Montane woodland - Lodgepole pine
 WMOM  Montane woodland - Mixed conifer/aspen woodland
 WMOS  Montane woodland - Engelmann spruce/subalpine fir
WPJ Pinyon/Juniper (group)
WPP Ponderosa pine (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: 27-Feb-2024