Head to head
Sooty Tern vs Black-legged Kittiwake
The sooty tern and black-legged kittiwake are both seabirds that spend the vast majority of their lives away from land, but they occupy very different oceans and climates.
| Sooty Tern | Black-legged Kittiwake | |
|---|---|---|
| Scientific name | Onychoprion fuscatus | Rissa tridactyla |
| Climate zone | Tropical | Cold Northern Hemisphere waters |
| Time spent airborne | Potentially years without landing | Most of the year at sea |
| Breeding site | Dense tropical island colonies | Narrow cliff ledges |
| Plumage | Sooty black and white | Pale grey, black wingtips |
| Conservation status | Least Concern | Vulnerable |
| Population trend | Stable | Decreasing |
| Habitat | Ocean, coastal | Ocean, coastal |
Sooty Tern vs Black-legged Kittiwake: common questions
Which spends more time continuously in the air, the sooty tern or the black-legged kittiwake?
The sooty tern spends more time continuously airborne, capable of remaining in flight over open ocean for years without landing, while the black-legged kittiwake, though also highly pelagic, still lands on the water and returns to land each year to breed.
Where do the sooty tern and black-legged kittiwake breed?
The sooty tern breeds in enormous, densely packed colonies on tropical islands, while the black-legged kittiwake nests colonially on extremely narrow cliff ledges in colder Northern Hemisphere waters, a very different climate and nesting structure.
Which species is more threatened, the sooty tern or the black-legged kittiwake?
The black-legged kittiwake is more threatened, classified as Vulnerable due to declines linked to shifting fish availability, while the sooty tern remains classified as Least Concern with a stable population across its pantropical range.