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BBS Route · Michigan · BCR 12

Isabella Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 131 species recorded across 37 survey years, no longer active.

131Species 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 →
37Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2012Span
5Observers

Bird Species Found on Michigan Isabella

Top 40 of 131 species by most recent count. Each links to its species trend.

Species recorded on the Isabella 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
Red-eyed VireoVireonidae252012+8%1969
OvenbirdParulidae242012-7%1969
European StarlingSturnidae152010-63%1969
American RobinTurdidae142012-50%1969
Nashville WarblerParulidae122009+29%1969
Cedar WaxwingBombycillidae102010-10%1969
Black-capped ChickadeeParidae82012+186%1969
Chipping SparrowPasserellidae72012+78%1969
Wood ThrushTurdidae72012-41%1969
Blue JayCorvidae62012-72%1969
American CrowCorvidae62012-19%1969
American RedstartParulidae62012+150%1970
Green-winged TealAnatidae61987n/an/a
Black-throated Green WarblerParulidae52012-32%1969
Double-crested CormorantPhalacrocoracidae51988n/an/a
American GoldfinchFringillidae42012-8%1969
Indigo BuntingCardinalidae42012+25%1969
Cliff SwallowHirundinidae41998+0%1975
VeeryTurdidae42012-30%1969
Northern WaterthrushParulidae42004+75%1979
Ruffed GrousePhasianidae41998+20%1985
Connecticut WarblerParulidae41989+100%1986
Herring GullLaridae32004+75%1969
Chimney SwiftApodidae32004+33%1970
Eastern Wood-PeweeTyrannidae32012-63%1969
Least FlycatcherTyrannidae32011-84%1969
Common GrackleIcteridae32011+25%1970
White-throated SparrowPasserellidae32012-72%1969
Eastern TowheePasserellidae31998+167%1973
Common NighthawkCaprimulgidae32000-14%1975
Northern House WrenTroglodytidae32011+100%1978
Mourning WarblerParulidae32006+200%1980
Bank SwallowHirundinidae31986-25%1978
Tennessee WarblerParulidae32009+33%2000
Eastern KingbirdTyrannidae22008-77%1969
Eastern PhoebeTyrannidae22008-43%1969
Common RavenCorvidae22012-86%1969
Vesper SparrowPasserellidae22011+67%1974
Song SparrowPasserellidae22012-59%1969
Scarlet TanagerCardinalidae22011-56%1969

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