Rhinoceros Hornbill
Buceros rhinoceros
Majestic and stately inhabitant of mature lowland and foothill forests. Pitch black with a white tail marked by a single dark bar. Enormous bill is bright orange with a prominent casque that is short and rectangular in females, long and upswept in males. Often seen in powerful flight over forests, typically in pairs or small groups. Gives low, resonant calls, usually in series: either a single-syllabled “rohh” or a disyllabic “roh-ow.”
识别特征
The rhinoceros hornbill is a large arboreal hornbill, 80 to 90 cm (31–35 in) long. The weight varies by sex, with males weighing around 2,465 to 2,960 g (87.0–104.4 oz) and the females 2,040 to 2,330 g (72–82 oz). The plumage is predominantly black, with white legs and vent and a white tail with a black band. The huge bill and casque are orange and red, the colour coming from preen oil rubbed on from the preen gland above the tail. The eyes of the male are red with black rims, and white with red rims in the female.
分类信息
The rhinoceros hornbill was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae. He placed it with the great hornbill in the genus Buceros and coined the binomial name Buceros rhinoceros. Linnaeus specified the location as China. The genus name is from Latin becerus meaning "horned like an ox" which in turn is from the Ancient Greek boukerōs which combines bous meaning "ox" with kerōs meaning "horn". The specific rhinoceros is Latin for "rhinoceros".<p>Three subspecies are recognised:
- 学名
- Buceros rhinoceros
- 命名信息
- Linnaeus, 1758
- 目
- Bucerotiformes
- 科
- Bucerotidae
- 属
- Buceros
分布与栖息地
- 迁徙
- Resident species
行为
The diet of the rhinoceros hornbill is dominated by fruit, but it will take any insect, small reptile, rodent, and smaller birds that it can catch.<p>The courtship and bonding of these birds are critical, as the female must trust the male to provide her with everything when she is incubating and raising chicks. These hornbills make their nests inside tree trunks, and the female stays inside with the eggs and then with the chicks, while the male brings them food. After the eggs are laid, the male collects mud, and the pair pack that mud, along with food and feces, to wall up the entrance to the tree cavity. They leave a very small hole, just large enough for the male to feed the female, and later the chicks, and for the female to defecate through the hole. Once the chicks are fully feathered and old enough to leave the nest, the parents chip away the dry mud to let the chicks out.
保护状况
The rhinoceros hornbill faces a number of threats, including loss of its rainforest habitat, as well as hunting for its meat, and its skull and feathers. Habitat destruction has led to the loss of the large trees the species requires for breeding, which in turn makes it easier for poachers to find the rhinoceros hornbill. It is frequently shot at by poachers due to confusion with the highly sought-after helmeted hornbill. Due to this, the species was uplisted to vulnerable from near threatened on the IUCN Red List in 2018.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Andean Condor
Vultur gryphus
Huge, wide-ranging vulture of the Andes, but also ranges into lowlands in southern Chile and Tierra del Fuego. Locally fairly common in Chile and adjacent Argentina, less numerous northward. Mainly seen as singles or pairs, sailing high over ridges, but tens can gather at roosts and to scavenge at carcasses. Size alone is diagnostic, but can be difficult to judge at a distance: note very long “fingers” at wingtips and white collar of adult. Adult also has diagnostic big white panels on upperwing, visible as birds bank. Immatures dark overall, becoming like adult in about 5 years.
Trinidad Euphonia
Euphonia trinitatis
Chunky, small bird with short bill and tail. Male blue black above and on throat, bright yellow below and on forecrown. Female olive above and yellow below with grayish-white breast. Both sexes show extensive white on underside of tail. Often in pairs, with male perching and singing from tops of trees. Common in dry to humid woodlands. Common call consists of two clear, whistled notes, “tee dee.” Male distinguished from other euphonias by forecrown color and size, along with color of throat and underparts; male plumage identical to Purple-throated Euphonia. Female distinguished by presence of gray-white color in breast, along with color of undertail coverts and white underside to tail.
Horned Sungem
Heliactin bilophus
Stunning hummingbird with a short straight bill. Males have a dark blue crown with red, blue, and gold tufted “horns” on the side. Otherwise largely metallic green above and white below with a black throat. Females have a green cap and lack the horns. Found in riverine belts and open savanna grasslands; may venture into adjacent human-modified habitats.
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