Speckled Hummingbird
Adelomyia melanogenys
Small brownish hummingbird with distinctive black cheek and pale buffy eyebrow. Throat variably speckled; some populations are cleaner than others. Green back; dark tail with buffy corners. Face pattern could recall a hermit, but combination of small size, straight dark bill, and squared tail should alleviate any confusion. Widespread and fairly common in the Andes, where it forages low within forest or at the forest edge. Found from 1,000–3,000m. Visits feeders.
识别特征
The speckled hummingbird is a monomorphic species, making females and males indistinguishable. Adults measure approximately 8 cm, or 3 inches, in length (from bill to tip of tail). The upper plumage is a glossy green/bronze. The underside is pale, with green and bronze specks. It has a black cheek patch below its eye with a white stripe above.
分类信息
While the speckled hummingbird is the only species in its genus, evidence suggests that populations on either side of the Andes mountains are genetically distinct, especially due to its broad geographic and ecological distribution. Relationships with other hummingbirds are uncertain and is still in need of further studies.<p>Based on plumage coloration and biogeography, eight subspecies have been described, and known as Adelomyia melanogenys melanogenys, inornata, connectens, maculata, aenosticta, chlorospila, debellardiana and cervina. A recent study of this genus, based on molecular, morphological and ecological data recovered six monophyletic clades which show distributional limits at well-defined geographic barriers, not corresponding with the currently recognized limits of subspecies. Sequence divergence ranged between 5.8% and 8.2% between phylogroups separated by >4000 km and <50 km distances respectively, this gives support to the idea that geographic isolation may be influential at very different scales. Morphological traits are more related to environmental heterogeneity than to geographic barriers and isolation.
- 学名
- Adelomyia melanogenys
- 命名信息
- (Fraser, 1840)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Adelomyia
分布与栖息地
- 迁徙
- Resident species
行为
The speckled hummingbird is a solitary species. They neither live nor migrate in flocks and there is no pair bond for this species, making them a mainly sedentary species. Nevertheless, individuals may disperse to lower altitudes as the breeding periods finish.<p>Males do not participate in any part of nest building or brooding of the young, and disengage with female partners after copulation. Though, both males and females may be promiscuous, having multiple partners.<p>Female speckled hummingbirds incubate and feed nestlings. A clutch consists of two white eggs; measurements consist of 12.4 mm × 8.7 mm and 12.6 mm × 8.6 mm. The incubation period lasts approximately 17–20 days. The species broods for shorter durations than most hummingbirds during incubation. Speckled hummingbirds often travel several kilometers to avoid competition, making visits to the nest less frequent. After the young hatch, the adult continues brooding hatchlings for 7–8 days. After brooding and until the young have fledged, the adult will no longer enter the nest and instead perch nearby, potentially watching for predators. This behavior is curious, as perching outside a nest may alert predators of its location. Nests can be found all year round, and consist of a bulky cup shaped of moss and cobweb, lined with plant fibre. The construction of nests have been observed on moss-covered trunks or on rocky ridges, at the entrance of caves, at a height of 1–3 m.<p>The species does not gather with others to feed, even on flowering trees. Speckled hummingbirds feed on the nectar of flowers, often near the ground, either from short-tubed flowers or holes at the base of long-tubed flowers. Like other hummingbird species, it is likely that the speckled hummingbird will also feed on insects, for additional nutrients. The species may also collect small insects that are caught on or in the nest.
保护状况
Not globally threatened (Least Concern). A very common hummingbird of moderate elevations in the Andes. Particularly abundant in the Andes above of Cali, Colombia, with densities of at least 10–12 pairs/km².
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
Black Scimitarbill
Rhinopomastus aterrimus
This all-black bird has a long, slim bill, and a fairly long tail. In flight, white bars across the wings are revealed. Birds in the eastern part of the range also have white in the outer tail, while the western birds have all-black tails. Found in a variety of savanna habitats. The call is a series of fluted, rising “wheet” notes; similar to Common Scimitarbill, but higher-pitched. Also similar in appearance to Common Scimitarbill, but there is little overlap in range, and Black is separated by its straighter bill and slightly shorter and less pointed tail. Separated from woodhoopoes by its shorter, less floppy, and squarer tail.
Fulvous-dotted Treerunner
Margarornis stellatus
A uniquely-marked little Furnariid. Very uncommon in restricted range on the west slope of the Andes in Colombia and Ecuador. Mostly bright orange-rufous with a dazzling white throat that bleeds down into bold speckles on upper breast. Singles or pairs forage with mixed-species flocks, usually hitching along mossy branches in the middle to upper levels. Occurs in humid mossy forest from around 1,200–2,200 m, typically at lower elevations than Pearled Treerunner.
Gray-headed Piprites
Piprites griseiceps
Confusing forest species, rare and difficult to find among mixed flocks. Typically stays at middle levels. Overall dull olive with yellower underparts and proportionally large gray head. Most noteworthy are the stout bill and large eye with a thin whitish eyering.
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