BirdAnalyst
BBS Route · Wisconsin · BCR 23

Grimms Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 117 species recorded across 23 survey years, still active.

117Species Recorded
23Years Surveyed
1998–2021Span
2Observers

Bird Species Found on Wisconsin Grimms

Top 40 of 117 species by most recent count. Each links to its species trend.

Species recorded on the Grimms route.
History
Red-winged BlackbirdIcteridae2292021+31%2000
House SparrowPasseridae1482021+7%2000
American RobinTurdidae1412021+174%2000
European StarlingSturnidae1402021+65%2000
Brown-headed CowbirdIcteridae962021+382%2000
Common GrackleIcteridae522021+59%2000
Mourning DoveColumbidae472021+48%2000
Sandhill CraneGruidae442021+650%2005
DickcisselCardinalidae412021+700%2001
Song SparrowPasserellidae402021+45%2000
American CrowCorvidae382021-21%2000
Rock PigeonColumbidae342021+44%2000
Savannah SparrowPasserellidae322021-57%2000
Barn SwallowHirundinidae302021+40%2000
Chipping SparrowPasserellidae282021+8%2000
American White PelicanPelecanidae282018+8%2017
Yellow WarblerParulidae252021+189%2000
Northern House WrenTroglodytidae252021+179%2000
American GoldfinchFringillidae222021+39%2000
Baltimore OrioleIcteridae212021+333%2000
Warbling VireoVireonidae192021+364%2000
Common YellowthroatParulidae192021-4%2000
KilldeerCharadriidae182021-22%2000
Horned LarkAlaudidae182021+53%2000
Red-eyed VireoVireonidae172021+550%2002
Northern CardinalCardinalidae152021+128%2000
Canada GooseAnatidae152021+106%2004
Indigo BuntingCardinalidae112021+100%2000
Cliff SwallowHirundinidae11202111×2000
Cedar WaxwingBombycillidae112021+69%2000
Chimney SwiftApodidae102021+26%2000
Tree SwallowHirundinidae102021+18%2000
Great Crested FlycatcherTyrannidae72021+44%2000
House FinchFringillidae72021+25%2001
Blue JayCorvidae62021+54%2000
Gray CatbirdMimidae62021+133%2000
Bank SwallowHirundinidae62021+233%2003
BobolinkIcteridae52021-70%2000
Clay-colored SparrowPasserellidae52021+80%2008
Red-tailed HawkAccipitridae42021+117%2000

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