BirdAnalyst
BBS Route · Idaho · BCR 10

Lolo Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 103 species recorded across 24 survey years, still active.

103Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2019Span
2Observers

Bird Species Found on Idaho Lolo Pass

Top 40 of 103 species by most recent count. Each links to its species trend.

Species recorded on the Lolo Pass 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
Townsend's WarblerParulidae1622019+52%1994
Swainson's ThrushTurdidae962019-17%1994
American RobinTurdidae322019-37%1994
Varied ThrushTurdidae322019-64%1994
Ruby-crowned KingletRegulidae282019-36%1994
MacGillivray's WarblerParulidae252019-15%1994
Western TanagerCardinalidae232019+98%1994
Golden-crowned KingletRegulidae192019-44%1994
Pacific WrenTroglodytidae152019+13%1996
White-winged CrossbillFringillidae142000n/an/a
Olive-sided FlycatcherTyrannidae132019-63%1994
Common RavenCorvidae122019+109%1995
Wilson's WarblerParulidae122019-47%1995
Black-capped ChickadeeParidae122016-38%1996
Red-breasted NuthatchSittidae102019-69%1994
Brown CreeperCerthiidae102019+500%2001
Fox SparrowPasserellidae92019-55%1994
Warbling VireoVireonidae92019+40%1997
Chipping SparrowPasserellidae82019-82%1994
Nashville WarblerParulidae82019+67%2005
American CootRallidae82001+167%2000
Red-naped SapsuckerPicidae72016+33%1994
Pine SiskinFringillidae62019-7%1995
Cassin's VireoVireonidae62019+13%1996
Black-headed GrosbeakCardinalidae52019+22%1994
Townsend's SolitaireTurdidae52019+100%1995
Clark's NutcrackerCorvidae51998+67%1993
Blue-winged TealAnatidae42004+100%1992
Song SparrowPasserellidae42019+40%1994
Violet-green SwallowHirundinidae42019+83%1993
Mountain ChickadeeParidae42019-84%1995
Lincoln's SparrowPasserellidae42019-51%1995
Pine GrosbeakFringillidae42019+0%1998
Cedar WaxwingBombycillidae42003+125%1997
Pileated WoodpeckerPicidae32019+75%1994
Hammond's FlycatcherTyrannidae32019+0%1999
Red CrossbillFringillidae32019-82%1995
Cliff SwallowHirundinidae31994-63%1993
Chestnut-backed ChickadeeParidae32019-48%1996
Mountain BluebirdTurdidae32010+50%1993

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