Blue Noddy vs Aleutian Tern

Anous ceruleus compared with Onychoprion aleuticus

Side-by-Side Comparison

Attribute Blue Noddy Aleutian Tern
Scientific Name Anous ceruleus Onychoprion aleuticus
Order Charadriiformes Charadriiformes
Family Laridae Laridae
Conservation Status Least Concern Vulnerable
Length — —
Wingspan 35.2 cm (13.9 in) 52.4 cm (20.6 in)
Weight 51.85 g (1.83 oz) 104.88 g (3.70 oz)
Diet -- --
Clutch Size 1 1-4
Population Trend — —

Habitat Comparison

Shared Habitats

Blue Noddy only

None

Aleutian Tern only

Conservation Status

Least Concern

Blue Noddy

Vulnerable

Aleutian Tern

About These Birds

Blue Noddy

Blue Noddy is a tiny seabird, 25–28 cm, restricted to tropical Pacific atolls including Hawaii and Tuamotu. Pale blue-grey above, whitish below, with a distinctive pale cap. Piscivore; flutters low over lagoons picking prey from the surface. Near Threatened.

Aleutian Tern

Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.

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