Broad-billed Roller
Eurystomus glaucurus
A small, dark, rufous-cinnamon roller with a chunky yellow bill. In flight it resembles a small falcon, but note its deep wingbeats and undulating flight. Pairs are partial migrants with complex movements; found within savanna, broadleaved woodland, riverine forest, and rainforest edge. It sits on tall bare snags and prefers to hawk insects above the canopy. Its distinctive calls include harsh, scratchy “grrrrrr” and “k-weeek, k-weeek” notes. The similar Blue-throated Roller is smaller, has a blue throat, and is browner under the tail.
识别特征
The broad-billed roller is 29–30 cm in length. It has a warm back and head, lilac foreneck and breast, with the rest of the plumage mainly brown. The broad bill is bright yellow. Sexes are similar, but the juvenile is a drabber version of the adult, with a pale breast.The broad-billed roller is striking in its strong direct flight, with the brilliant blues of the wings and tail contrasting with the brown back.<p>The call of the broad-billed roller is a snarling k-k-k-k-k-r-r-r-r-r sound.
分类信息
The broad-billed roller was formally described in 1776 by the German zoologist Philipp Ludwig Statius Müller under the binomial name Coracias glaucurus. The specific epithet is from Ancient Greek glaukos meaning "blue-grey". Statius Müller based his brief description on "Le Rollier de Madagascar" that had been described in 1775 by the French polymath Georges-Louis Leclerc, Comte de Buffon and illustrated by Edme-Louis Daubenton. The type locality is Madagascar. The broad-billed roller is now placed in the genus Eurystomus that was introduced in 1816 by the French ornithologist Louis Pierre Vieillot. A molecular phylogenetic study published in 2018 found that the broad-billed roller was most closely related to the blue-throated roller (Eurystomus gularis). Alternate names for the broad-billed roller include the African broad-billed roller and the cinnamon roller.<p>Four subspecies are recognized:
- 学名
- Eurystomus glaucurus
- 命名信息
- (Müller, PLS, 1776)
- 目
- Coraciiformes
- 科
- Coraciidae
- 属
- Eurystomus
分布与栖息地
This is a species of open woodland with some tall trees, preferably near water. These rollers often perch prominently on trees, posts or overhead wires, like giant shrikes.
- 迁徙
- Complete migrants
行为
They are inactive for most of the day, apart from chasing intruders, but in late afternoon they hunt for the swarming ants and termites on which they feed, sometimes in groups of 100 or more rollers. They drink like swallows, dipping their bills into water in flight.<p>This bird nests in an unlined hole in a tree cavity, laying 2-3 eggs.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Javan Scimitar-Babbler
Pomatorhinus montanus
An attractive, fierce-eyed babbler of tropical montane rainforest. Black head with thin, white eyebrow, white from the throat to mid-belly, contrasting strongly with remaining dark maroon body. Note the slightly decurved, yellow bill. Forages in noisy, small groups through the midstorey. Unmistakable if seen well. Calls variable, but commonly gives a soft “wu-tu” followed by a rising “whit!”, quickly repeated. Groups also give an excited chatter.
Spix's Warbling-Antbird
Hypocnemis striata
Relatively small antbird with heavily streaked upperparts, spotted chest, and rusty lower back and belly. Inhabits the understory of humid forest, seasonally flooded forest, and tall second growth. Forages in dense vine tangles, and sometimes accompanies mixed-species flocks or attends army-ant swarms. The song is a descending series of 9-10 clear notes ending abruptly. Similar to Rondonia Warbling-Antbird, but Spix's Warbling-Antbird has a black (not gray) mantle and a more heavily streaked breast, while the back of females is less streaked and duller brown.
Olive-shouldered Parrot
Aprosmictus jonquillaceus
A large, long-tailed green parrot with an orange bill and a wing patch, red in males and yellow in females, that is visible both perched and in flight. Juvenile is like female, but lacks wing patch. Singles or small flocks can be found in a variety of wooded areas, like forests and plantations, in lowlands and mountains. Limited to a few islands in the Lesser Sundas. Distinguished from Olive-headed and Marigold Lorikeets by its larger size, its broad square tail, and its lack of a dark hood. Gives raucous, shrill screeches, high-pitched tinkling, and lower-pitched “kraak-kraaak” calls.
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