Northern Fulmar vs Juan Fernandez Petrel
Fulmarus glacialis compared with Pterodroma externa
Side-by-Side Comparison
| Attribute | Northern Fulmar | Juan Fernandez Petrel |
|---|---|---|
| Scientific Name | Fulmarus glacialis | Pterodroma externa |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Vulnerable |
| Length | 47.0 cm (18.5 in) | — |
| Wingspan | 107.0 cm (42.1 in) | 58.3 cm (23.0 in) |
| Weight | 750.0 g (26.46 oz) | 432.5 g (15.26 oz) |
| Diet | Fish, squid, crustaceans, offal from fishing vessels, and zooplankton. Feeds by surface-seizing and shallow plunge-diving. | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Northern Fulmar
Open ocean and sea cliffs. Breeds on cliff ledges and grassy slopes on northern coastlines. Pelagic outside breeding season.
Song & Call Comparison
Northern Fulmar
A nasal, cackling 'kak-kak-kak-kak' or grunting 'uh-uh-uh' at the nest and colony. Less melodic than petrels. In flight gives occasional single nasal calls.
Juan Fernandez Petrel
Geographic Range & Migration
Northern Fulmar
North Atlantic and North Pacific oceans. Breeds from the Arctic south to Britain, France, and New England.
Juan Fernandez Petrel
Conservation Status
Northern Fulmar
Juan Fernandez Petrel
How to Tell Them Apart
Northern Fulmar
Light morph: white head and underparts with grey wings and back. Dark morph: entirely grey. Tube-nosed bill and stiff-winged flight distinctive at sea.
Yellowish hooked bill with prominent tubular nostrils on top
Juan Fernandez Petrel
About These Birds
Northern Fulmar
The northern fulmar is a long-lived seabird that can survive over 40 years. It defends its nest by projectile-vomiting a foul-smelling stomach oil at intruders, which can mat the feathers of predators and cause fatal loss of waterproofing. Fulmars have expanded their breeding range dramatically southward over the past two centuries.
Juan Fernandez Petrel
43 cm, wingspan 97 cm. Large; dark grey-brown above with white nape and underparts; dark carpal bar and partial collar. Breeds Juan Fernandez Islands (Chile); ranges across subtropical Pacific. Vulnerable due to small breeding range; feeds on fish and squid.