Heermann's Gull vs Black-bellied Tern
Larus heermanni compared with Sterna acuticauda
Side-by-Side Comparison
| Attribute | Heermann's Gull | Black-bellied Tern |
|---|---|---|
| Scientific Name | Larus heermanni | Sterna acuticauda |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Near Threatened | Endangered |
| Length | — | — |
| Wingspan | 67.2 cm (26.5 in) | 44.8 cm (17.6 in) |
| Weight | 448.26666666666665 g (15.81 oz) | 159.5 g (5.63 oz) |
| Diet | -- | -- |
| Clutch Size | 1-2 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Near Threatened
Heermann's Gull
Endangered
Black-bellied Tern
About These Birds
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.
Black-bellied Tern
Black-bellied Tern, 32–34 cm, is an Endangered freshwater tern of the Indian subcontinent, breeding on large river sandbars from Pakistan to Myanmar. Black belly contrasts with grey upperparts in breeding plumage; orange bill. Plunge-dives for small fish. Severely threatened by river modification.