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BBS Route · Alaska · BCR 4

Caribou Mtn. Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 53 species recorded across 31 survey years, still active.

53Species 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 →
31Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2025Span
8Observers

Bird Species Found on Alaska Caribou Mtn.

Top 40 of 53 species by most recent count. Each links to its species trend.

Species recorded on the Caribou Mtn. 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
White-crowned SparrowPasserellidae762025+124%1995
Alder FlycatcherTyrannidae352025+148%1995
Swainson's ThrushTurdidae322025+92%1995
Wilson's WarblerParulidae272025-11%1997
Fox SparrowPasserellidae262025+154%1995
Lincoln's SparrowPasserellidae142024+38%1997
American RobinTurdidae122025+16%1995
Gray-cheeked ThrushTurdidae72025-26%1995
Orange-crowned WarblerParulidae72025-39%1997
Blackpoll WarblerParulidae72021+100%2008
Golden-crowned SparrowPasserellidae62023+350%2012
American Tree SparrowPasserellidae62025-77%1996
Common RavenCorvidae62025+160%2000
Savannah SparrowPasserellidae52025+6%1995
Yellow WarblerParulidae52025+17%1997
Olive-sided FlycatcherTyrannidae32024+233%2005
Spotted SandpiperScolopacidae32018+200%2003
Wilson's SnipeScolopacidae22025+25%1995
Lapland LongspurCalcariidae21993n/an/a
Violet-green SwallowHirundinidae22013+33%1994
Townsend's WarblerParulidae22002+100%1993
Ruby-crowned KingletRegulidae22025-48%1995
Willow PtarmiganPhasianidae22023+100%1997
MerlinFalconidae22022+0%2007
Northern Hawk OwlStrigidae22001n/an/a
Bohemian WaxwingBombycillidae22024+0%2014
Long-tailed JaegerStercorariidae12007+0%2000
Lesser YellowlegsScolopacidae12024-25%1997
Hammond's FlycatcherTyrannidae12018+0%1993
Canada JayCorvidae12025-13%1995
Hermit ThrushTurdidae12008-70%2001
Varied ThrushTurdidae12025-57%1995
Sandhill CraneGruidae12023+17%2001
White-winged CrossbillFringillidae12025+50%2004
Northern PintailAnatidae11995n/an/a
WhimbrelScolopacidae12015-71%1996
American Golden-PloverCharadriidae11995n/an/a
Northern WaterthrushParulidae12024-67%2002
Canada GooseAnatidae12018-50%1997
Pine GrosbeakFringillidae12025-20%2005

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.