Bridled Tern

Onychoprion anaethetus

Tropical tern with gray back, black cap, and white forehead. Nonbreeding and immatures have a messy dark nape. Most similar to Sooty Tern but paler gray above with more extensive white tail edges, paler undersides of flight feathers, as well as longer and more slender eyebrow. Also compare with the paler Gray-backed Tern. Bridled Tern is found in warm tropical waters worldwide. It breeds on islands, usually concealed by a large rock or bush. Otherwise, usually stays far offshore, often seen perching on floating wood or debris. Rarely seen near land except when blown off course by a hurricane.

Identification

This is a medium-sized tern, at 30–32 cm in length and with a 77–81 cm wingspan similar to the common tern in size, but more heavily built. The wings and deeply forked tail are long, and it has dark grey upperparts and white underparts. The forehead and eyebrows are white, as is a striking collar on the hindneck. It has black legs and bill. Juvenile bridled terns are scaly grey above and pale below.<p>This species is unlikely to be confused with any tern apart from the similarly dark-backed sooty tern and the spectacled tern from the Tropical Pacific. It is paler-backed than that sooty, (but not as pale as the grey-backed) and has a narrower white forehead and a pale neck collar.

Taxonomy

Scientific name
Onychoprion anaethetus
Authority
(Scopoli, 1786)
Order
Charadriiformes
Family
Laridae
Genus
Onychoprion

Range and habitat

This bird is migratory and dispersive, wintering more widely through the tropical oceans. It has markedly marine habits compared to most terns. The Atlantic subspecies melanopterus breeds in Mexico, the Caribbean and west Africa; other races occur around the Arabian Peninsula and in Southeast Asia and Australasia, but the exact number of valid subspecies is disputed. It is a rare vagrant to western Europe.These are the four subspecies listed by the IOC:

Migration
Complete migrants

Conservation

Population trend
unknown

Photos

Distribution

Bird Calls

Other Birds

Banded Honeyeater

Banded Honeyeater

Cissomela pectoralis

Small black-and-white honeyeater found in drier woodlands of northern tropical Australia. Black above, white below, with neat white cheeks and black breast band. Nonbreeding adult has brownish back. Immature has yellow cheeks and brown upperparts. Juvenile similar but even paler brown and has very indistinct breast band.

Eurasian Blackcap

Eurasian Blackcap

Sylvia atricapilla

A rather distinctive and bulky warbler: male plain grayish overall with eponymous black cap; female and juvenile plain, slightly browner overall, with rusty-brown cap. Inhabits wooded and scrubby habitats, including gardens, sometimes visiting feeders in the winter. Small numbers winter in Western Europe, but most migratory birds move south to Africa and the Mediterranean region. Song is a varied, rather loud rich warble, often strident. Often gives a harsh “chakchak” call, usually in series. Rare dark morph with black-hooded male and brown-hooded female can be found on the Atlantic Islands and very scarcely elsewhere.

Sula Hanging-Parrot

Sula Hanging-Parrot

Loriculus sclateri

A tiny stub-tailed green parrot with a golden-bronze back, a narrow red throat, a bright red rump, and a small red shoulder patch. Juveniles are duller and more poorly marked. Singles or small groups occur within treetops of forest and nearby secondary growth areas in the lowlands. No other tiny green, short-tailed parrot occurs within its limited range in the Sula and Banggai islands. Very high-pitched calls include “zeet-weet-wit,” rising in pitch at the end. Sometimes birds only utter the first two notes or single “zeet” notes.

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