Gulls & Terns in Puerto Rico
Our list for Puerto Rico has 9 gulls & terns recorded regularly there: 1 resident, 1 summer visitor, 3 winter visitors and 4 passage migrants
Most likely in October
GBIF · OctShare of all bird records in Puerto Rico in October, 2019–2024. Each month links to that month’s page.
All 9, most common first
Sandwich TernThalasseus sandvicensisResidentCommon36–41 cmRecorded all year
Roseate TernSterna dougalliiSummer visitorUncommon33–41 cmRegularly Apr–Sep
Common TernSterna hirundoWinter visitorUncommon31–35 cmRegularly Jul–Mar
Black TernChlidonias nigerPassage migrantRare22–26 cmRegularly Sep
Lesser Black-backed GullLarus fuscusWinter visitorRare52–64 cmRegularly Oct–Mar
Ring-billed GullLarus delawarensisWinter visitorRare43–54 cmRegularly Oct–Mar
Gull-billed TernGelochelidon niloticaPassage migrantRare33–42 cmRegularly May–Oct
American Herring GullLarus smithsonianusPassage migrantRare53–65 cmRegularly Mar
Great Black-backed GullLarus marinusPassage migrantRare64–79 cmRegularly Jan
Smallest to largest
Length, cmData: 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