Head to head
Roseate Tern vs Common Tern
The roseate tern and common tern often breed side by side in mixed colonies, similar enough to require a close look to separate confidently.
| Roseate Tern | Common Tern | |
|---|---|---|
| Scientific name | Sterna dougallii | Sterna hirundo |
| Tail streamers | Unusually long | Moderately long |
| Bill colour (breeding) | Mostly black, small reddish base | Red-orange, black tip |
| Breeding colony pattern | Small, scattered colonies | Widespread colonies |
| Native range | Atlantic, Indian, Pacific coasts | North America, Europe, Asia |
| Conservation status | Least Concern | Least Concern |
| Population trend | Decreasing | Decreasing |
| Habitat | Coastal | Coastal, wetlands |
Roseate Tern vs Common Tern: common questions
How can you tell a roseate tern from a common tern?
The roseate tern has noticeably longer tail streamers extending well past the wingtips, along with a mostly black bill with a small reddish base, compared to the common tern's red-orange bill tipped with black.
Why does the roseate tern face more regional conservation concern than the common tern?
The roseate tern breeds in small, scattered colonies across several ocean basins, a pattern that leaves local populations more vulnerable to disturbance than the common tern's more widespread and numerous breeding colonies.
Do the roseate tern and common tern nest together?
Yes, both species often breed in mixed colonies alongside each other, requiring a close look at bill colour and tail length to reliably tell the two similar terns apart.