Atlantic White Tern vs Grey-backed Tern
Gygis alba verglichen mit Onychoprion lunatus
Side-by-Side Comparison
| Merkmal | Atlantic White Tern | Grey-backed Tern |
|---|---|---|
| Wissenschaftlicher Name | Gygis alba | Onychoprion lunatus |
| Ordnung | Charadriiformes | Charadriiformes |
| Familie | Laridae | Laridae |
| Erhaltungsstatus | Least Concern | Least Concern |
| Länge | — | — |
| Flügelspannweite | 50,4 cm (19.8 in) | 52,2 cm (20.6 in) |
| Gewicht | 138,0 g (4.87 oz) | 126,21666666666665 g (4.45 oz) |
| Ernährung | -- | -- |
| Gelegegröße | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Erhaltungsstatus
Least Concern
Atlantic White Tern
Least Concern
Grey-backed Tern
About These Birds
Atlantic White Tern
Atlantic White Tern: 28–33 cm, wingspan 76–87 cm, ethereally white seabird with blue-grey bill, blue orbital ring, and large dark eyes. Breeds on tropical Atlantic islands including Ascension and Saint Helena; related species widespread across the Indo-Pacific. Nests on bare branches with no nest material. Feeds on small fish near the surface.
Grey-backed Tern
Grey-backed Tern, 35–37 cm, is a Pacific seabird breeding on islands from Hawaii to Micronesia and Polynesia. Pale grey back distinguishes it from the similar Bridled Tern; white below with black cap. Piscivore; surface-dips and shallow plunge-dives. Largely pelagic when not breeding.