BirdAnalyst
BBS Route · Idaho · BCR 10

Pierce Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 78 species recorded across 11 survey years, still active.

78Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
11Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1990–2007Span
4Observers

Bird Species Found on Idaho Pierce

Top 40 of 78 species by most recent count. Each links to its species trend.

Species recorded on the Pierce route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Swainson's ThrushTurdidae532007+77%1993
Western TanagerCardinalidae282007+163%1993
MacGillivray's WarblerParulidae272007+332%1993
Song SparrowPasserellidae222007+46%1993
Townsend's WarblerParulidae212007+143%1993
Warbling VireoVireonidae192007+250%1994
Yellow WarblerParulidae162007-17%1993
Willow FlycatcherTyrannidae152007+18%1993
Golden-crowned KingletRegulidae132007-16%1993
American RobinTurdidae132007-17%1993
Pacific WrenTroglodytidae112007+71%1994
Hammond's FlycatcherTyrannidae102007+247%1993
Varied ThrushTurdidae102007-21%1993
Chestnut-backed ChickadeeParidae102007+483%1998
Brown-headed CowbirdIcteridae82007+350%1992
Canada JayCorvidae71998+75%1993
Violet-green SwallowHirundinidae72007-50%1993
Fox SparrowPasserellidae72007-17%1996
Ruby-crowned KingletRegulidae62005+233%1993
Western Wood-PeweeTyrannidae62007+22%1995
Olive-sided FlycatcherTyrannidae52007-22%1993
Pine SiskinFringillidae52007-52%1993
Black-headed GrosbeakCardinalidae52005+25%1993
Cassin's VireoVireonidae52007+113%1995
Lazuli BuntingCardinalidae52005+225%1995
Hermit ThrushTurdidae52005+400%1994
MallardAnatidae41998+300%1990
Steller's JayCorvidae42007+18%1993
Red-breasted NuthatchSittidae42007-24%1993
Williamson's SapsuckerPicidae42003n/an/a
Dusky FlycatcherTyrannidae32007-9%1993
Common RavenCorvidae32007+150%1993
Pileated WoodpeckerPicidae32007+100%1997
Northern House WrenTroglodytidae31997+150%1995
Common YellowthroatParulidae32007+50%2003
Belted KingfisherAlcedinidae22005-13%1994
Red CrossbillFringillidae22005+100%1990
Northern Rough-winged SwallowHirundinidae22007+20%1994
Cedar WaxwingBombycillidae22007+11%1993
OspreyPandionidae21992n/an/a

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.