Küstenseeschwalbe vs Grey-backed Tern

Sterna paradisaea verglichen mit Onychoprion lunatus

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Side-by-Side Comparison

Merkmal Küstenseeschwalbe Grey-backed Tern
Wissenschaftlicher Name Sterna paradisaea Onychoprion lunatus
Ordnung Charadriiformes Charadriiformes
Familie Laridae Laridae
Erhaltungsstatus Least Concern Least Concern
Länge 34,0 cm (13.4 in)
Flügelspannweite 80,0 cm (31.5 in) 52,2 cm (20.6 in)
Gewicht 110,0 g (3.88 oz) 126,21666666666665 g (4.45 oz)
Ernährung Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. --
Gelegegröße 2-3 1
Population Trend
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Size Comparison

Body Length
Küstenseeschwalbe 34,0 cm
Grey-backed Tern
Flügelspannweite
Küstenseeschwalbe 80,0 cm
Grey-backed Tern 52,2 cm
Gewicht
Küstenseeschwalbe 110,0 g
Grey-backed Tern 126,21666666666665 g
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Habitat Comparison

Gemeinsame Lebensräume

Küstenseeschwalbe only

Grey-backed Tern only

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Küstenseeschwalbe

Breeds on coastal and tundra habitats. Spends most of its life at sea over the open ocean. Nests in colonies on beaches and rocky shores.

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Song & Call Comparison

Küstenseeschwalbe

Gesang

A sharp, grating 'kree-yah' alarm call. Also gives 'kik-kik-kik' near the nest. Highly aggressive vocally during the Arctic breeding season. Calls are harsh and insistent.

Grey-backed Tern

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Geographic Range & Migration

Küstenseeschwalbe

Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.

Grey-backed Tern

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Erhaltungsstatus

Least Concern

Küstenseeschwalbe

Least Concern

Grey-backed Tern

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How to Tell Them Apart

Küstenseeschwalbe

Gefieder

Pale grey upperparts, white underparts with a black cap. Blood-red bill and short red legs. Deeply forked tail streamers. Winter adults lose the full black cap.

Schnabel

Slender, pointed, bright red bill

Grey-backed Tern

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About These Birds

Küstenseeschwalbe

Die Küstenseeschwalbe hält den Rekord für die längste bekannte Wanderung im Tierreich und legt jährlich rund 70.000 km zwischen Arktis und Antarktis und zurück zurück. Über ihre rund 30 Lebensjahre hinweg fliegt sie damit rechnerisch das Äquivalent von drei Rundreisen zum Mond. Dieser bemerkenswerte Vogel erlebt mehr Tageslicht als jedes andere Lebewesen der Erde.

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.

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Related Comparisons

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