BirdAnalyst
BBS Route · Delaware · BCR 30

Harrington Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 140 species recorded across 55 survey years, still active.

140Species Recorded
55Years Surveyed
1966–2024Span
5Observers

Bird Species Found on Delaware Harrington

Top 40 of 140 species by most recent count. Each links to its species trend.

Species recorded on the Harrington route.
History
Common GrackleIcteridae1262024+6%1968
Purple MartinHirundinidae118202436×1970
Carolina WrenTroglodytidae82202413×1968
Red-winged BlackbirdIcteridae812024-5%1968
European StarlingSturnidae762024+9%1968
Canada GooseAnatidae732024+623%1994
American RobinTurdidae652024+318%1968
Mourning DoveColumbidae622024+237%1968
Barn SwallowHirundinidae622024+170%1969
Turkey VultureCathartidae562024+287%1968
Northern CardinalCardinalidae502024+226%1968
Great Blue HeronArdeidae38202417×1972
Indigo BuntingCardinalidae372024+228%1968
House FinchFringillidae34202416×1985
House SparrowPasseridae332024-70%1968
Northern MockingbirdMimidae312024+7%1968
Great Crested FlycatcherTyrannidae282024+300%1968
Chipping SparrowPasserellidae282024-14%1968
Laughing GullLaridae242024-72%1968
American CrowCorvidae232024+17%1968
Brown-headed CowbirdIcteridae232024+269%1968
Song SparrowPasserellidae232024+65%1968
Seaside SparrowPasserellidae23202417×1973
Common YellowthroatParulidae222024+64%1968
Tufted TitmouseParidae202024+165%1968
Boat-tailed GrackleIcteridae202024+355%1970
Horned LarkAlaudidae182024+67%1968
Fish CrowCorvidae182024+820%1968
American GoldfinchFringillidae182024+400%1968
Blue GrosbeakCardinalidae17202412×1971
Red-bellied WoodpeckerPicidae162024+244%1968
Chimney SwiftApodidae162024+191%1968
Clapper RailRallidae142021+375%1969
WilletScolopacidae142024-36%1968
Eastern Wood-PeweeTyrannidae142024+121%1968
OspreyPandionidae122024+740%1968
Red-eyed VireoVireonidae112024+42%1968
Eastern BluebirdTurdidae102024+314%1989
Blue JayCorvidae82024+17%1968
Tree SwallowHirundinidae82024+333%1971

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