Rare Birds in Delaware
Our list for Delaware has 40 rare birds recorded regularly there: 3 residents, 4 summer visitors, 5 winter visitors, 20 passage migrants and 8 scarce visitors
Most likely in October
GBIF · Oct
Share of all bird records in Delaware in October, 2019–2024. Each month links to that month’s page.
All 40, most common first
Eurasian WigeonMareca penelopeWinter visitorRare42–51 cmRegularly Nov–Aug
Buff-breasted SandpiperCalidris subruficollisPassage migrantRare18–20 cmRegularly Aug–Sep
Roseate TernSterna dougalliiSummer visitorRare33–41 cmRegularly May–Jul
Upland SandpiperBartramia longicaudaPassage migrantRare28–32 cmRegularly Aug–Sep
Common PheasantPhasianus colchicusWinter visitorRare50–90 cmRegularly Nov–Jun
Baird's SandpiperCalidris bairdiiPassage migrantRare14–17 cmRegularly Aug–Sep
Mourning WarblerGeothlypis philadelphiaPassage migrantRare10–15 cmRegularly May–Oct
Sooty ShearwaterArdenna griseaPassage migrantRare40–51 cmRegularly May
Little GullHydrocoloeus minutusResidentRare25–30 cmRegularly Apr–May
Clay-colored SparrowSpizella pallidaPassage migrantRare13–15 cmRegularly Oct
Great ShearwaterArdenna gravisPassage migrantRare43–51 cmRegularly Sep
Pacific LoonGavia pacificaScarceRare58–74 cm
Alder FlycatcherEmpidonax alnorumPassage migrantRare13–17 cmRegularly May–Sep
Eurasian Collared DoveStreptopelia decaoctoScarceRare30–32 cmRegularly Feb
Black-necked GrebePodiceps nigricollisScarceRare28–34 cm
Greylag GooseAnser anserScarceRare75–90 cm
Pomarine JaegerStercorarius pomarinusScarceRare46–51 cm
Data: EOD – eBird Observation Dataset (Cornell Lab of Ornithology), accessed via GBIF.org, CC BY 4.0. Records from 2019–2024, aggregated and filtered by Birdfact. How these lists are made