Caspian Tern vs Heermann's Gull
Hydroprogne caspia comparé à Larus heermanni
Side-by-Side Comparison
| Attribut | Caspian Tern | Heermann's Gull |
|---|---|---|
| Nom scientifique | Hydroprogne caspia | Larus heermanni |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Least Concern | Near Threatened |
| Longueur | — | — |
| Envergure | 82,1 cm (32.3 in) | 67,2 cm (26.5 in) |
| Poids | 656,0 g (23.14 oz) | 448,26666666666665 g (15.81 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 2-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Statut de conservation
Least Concern
Caspian Tern
Near Threatened
Heermann's Gull
About These Birds
Caspian Tern
Caspian Tern is the world's largest tern, 48–56 cm, wingspan 127–140 cm, with a massive blood-red bill. Found on all continents except Antarctica. Plunge-dives powerfully for large fish in coastal and freshwater habitats. Migratory; northern populations winter in the tropics. Loud, rasping call.
Heermann's Gull
Heermann's Gull, 46–51 cm, is distinctive — dark grey body, white head (breeding), red bill. Breeds almost entirely on Isla Rasa in the Gulf of California, then disperses north along the Pacific coast to British Columbia. Kleptoparasite; steals fish from Brown Pelicans. Near Threatened; range highly restricted.