Bridled tern vs Spectacled tern
The spectacled tern is heavier: 120 g against 119.4 g for the bridled tern, about 1% more.
Photo: peterichman · CC BY-SA 2.0 · Wikimedia Commons
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Photo: Duncan Wright · Public domain · Wikimedia Commons
What is the difference between a bridled tern and a spectacled tern?
Each point below is worked out from a pair of recorded values.
- The spectacled tern is heavier: 120 g against 119.4 g for the bridled tern, about 1% more.
- The spectacled tern is longer-lived: 21.9 years against 17.9 years for the bridled tern, about 22% longer.
- Both belong to the genus Onychoprion, so they are close relatives.
- Both are listed as Least Concern on the IUCN Red List.
Side by side
| Bridled tern | Spectacled tern | |
|---|---|---|
| Scientific name | Onychoprion anaethetus | Onychoprion lunatus |
| Family | Laridae | Laridae |
| Order | Charadriiformes | Charadriiformes |
| Weight | 119.4 g – 139 g | 120 g – 138.8 g |
| Length | Not recorded | Not recorded |
| Lifespan | 17.9 years | 21.9 years |
| Main food | Not recorded | Not recorded |
| Habitat | marine | marine |
| Conservation status | Least Concern | Least Concern |
| Countries recorded | 1 | Not recorded |
A scale drawing needs a recorded length for both animals; only weights are on record for this pair.
Full record: Bridled ternFull record: Spectacled ternCompare other animals