Gulls & Terns in Guinea-Bissau
Our list for Guinea-Bissau has 5 gulls & terns recorded regularly there: 2 winter visitors and 3 passage migrants
Most likely in October
GBIF · OctShare of all bird records in Guinea-Bissau in October, 2019–2024. Each month links to that month’s page.
All 5, most common first
Gull-billed TernGelochelidon niloticaWinter visitorCommon33–42 cmRegularly Oct–Apr
Sandwich TernThalasseus sandvicensisWinter visitorCommon36–41 cmRegularly Oct–Apr
Little TernSternula albifronsPassage migrantUncommon21–25 cmRegularly Nov–Apr
Common TernSterna hirundoPassage migrantUncommon31–35 cmRegularly Nov–Apr
Black TernChlidonias nigerPassage migrantUncommon22–26 cmRegularly Nov
Smallest to largest
Length, cm- Little Tern 21–25 cm
- Black Tern 22–26 cm
- Common Tern 31–35 cm
- Gull-billed Tern 33–42 cm
- Sandwich Tern 36–41 cm
Body length, bill to tail. Rare birds in grey.
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