Long-tailed Jaeger

Stercorarius longicaudus

Slender gull-like seabird; the smallest of the three jaegers. Breeds on Arctic tundra; spends the rest of the year at sea. Difficult to separate from other jaegers, especially Parasitic. Breeding adults have an exceptionally long, pointed tail. Also note uniform brownish back contrasting with dark flight feathers, limited clean black cap, and pale yellow on the side of the neck. Immature birds have an attractive scaly pattern on wings and vary from dark brown to a pale grayish white. At all ages, note buoyant, tern-like flight. Typically shows white shafts only on two outermost wing feathers (fewer than other jaegers). Bill is shorter and proportionally thicker than other jaegers. Jaegers chase other birds and steal their food.

Identification

This species is unmistakable as an adult, with grey back, dark primary wing feathers without a white "flash", black cap and very long tail. Adults often hover over their breeding territories. Juveniles are much more problematic, and are difficult to separate from parasitic jaeger over the sea. They are slimmer, longer-winged and more tern-like than that species, but show the same wide range of plumage variation. However, they are usually colder toned than Arctic, with greyer shades, rather than brown.<p>This is the smallest of the skua family at 38–58 cm (15–23 in), depending on season and age. However up to 29 cm (11 in) of its length can be made up by the tail which may include the 15 cm (5.9 in) tail streamers of the summer adult. The wingspan of this species ranges from 102 to 117 cm (40 to 46 in) and the body mass is 230–444 g (8.1–15.7 oz).

Taxonomy

Scientific name
Stercorarius longicaudus
Authority
Vieillot, 1819
Order
Charadriiformes
Family
Stercorariidae
Genus
Stercorarius

Range and habitat

Breeding range
NA, PAL : Holarctic high and low Arctic tundra, locally subarctic: nw, se Greenland, Arctic n Scandinavia to ne Siberia and Kamchatka (e Russia); Arctic and w, s Alaska through Arctic Canada to Ellesmere and Baffin is.
Non-breeding range
highly pelagic and southerly: to offshore subantarctic and subtropical waters off w, sw, se Africa, s Madagascar, s Australia, Peru, Chile and ec Argentina
Migration
Complete migrants

Conservation

Population trend
stable

Photos

Distribution

Bird Calls

Other Birds

Socotra Bunting

Socotra Bunting

Emberiza socotrana

Brownish bunting with boldly striped black-and-white head, bright chestnut wings and buffy wash on the breast that fades towards the vent. Endemic to Socotra, where it prefers rocky areas in shrubland and grassland. Typically encountered hopping on the ground searching for food. Pairs breed between 600–1200m, but move to the coastal plain after breeding, where they form small flocks. Song is typically a series of three or four short strident notes, “tseet-tee-too” or “steet-tsoo-steet-tsoo.”

Javan Frogmouth

Javan Frogmouth

Batrachostomus javensis

Endemic to Java, where it is the only frogmouth. Fairly typical-looking small frogmouth, with brown plumage broken up by white patches and pale barring on the tail. Readily separated from nightjars by its upright pose and forward-facing eyes, and from owls by its bristly “whiskered” face, lack of a facial disc, large broad-based bill, and long tail. Inhabits a wide range of wooded habitats from lowlands up into montane foothills, from dense rainforests to the edges of large plantations with suitable tall growth. Nocturnal, and can be difficult to spot on day roost. Gives a variety of calls, including a series of descending whistles, a high-pitched growl followed by a strangled whistle, and short, grating screams.

Gray-headed Batis

Gray-headed Batis

Batis orientalis

A typical black, white, and gray batis. Note the chest band, which is black in males and chestnut in females. Found in dry savanna and thornscrub, often in pairs. Very similar to Western Black-headed Batis, and best distinguished by voice, but usually shows a paler gray crown. Also similar to Pygmy Batis, but larger, and the white eyebrow extends well behind the eye. The distinctive song is a descending series of several whistled notes. 

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