Spotted Kestrel
Falco moluccensis
Heavily-marked reddish-brown falcon, found in open habitats across much of the Indonesian Archipelago. Dense spotting on back and wings contrasts sharply with gray tail. Sexes generally similar, but female averages more densely patterned, with fine barring on the tail. The only resident kestrel throughout much of range, but potential for overlap with Australian and Eurasian Kestrels exists; note densely-patterned underparts, overall richer and darker coloration, and dark brown crown. Hovers and hunts from an exposed perch. Gives shrill yaps and squeaks.
识别特征
Spotted kestrels measure 26–32 cm (10–12.5 in) from head to tail, with a wingspan of 59–71 cm (23–28 in). On average, spotted kestrels weigh 162 g (5.7 oz). The sexual dimorphism in size and plumage is less pronounced than that of the common kestrel.<p>Males have grey tails with one broad subterminal band with white tips. Females also have grey tails with white tips, although they have 9 dark bands.<p>Juveniles are very similar to females, but they appear more darker and heavily marked.<p>The eggs resemble that of the common kestrel. The colour and shape of the egg is similar to Oriental hobby (Falco severus).
分类信息
Little is known about the spotted kestrel, although it is thought to be closely related to the Nankeen Kestrel (Falco cenchroides). Both species are considered members of the Falco tinnunculus group.
- 学名
- Falco moluccensis
- 命名信息
- (Bonaparte, 1850)
- 目
- Falconiformes
- 科
- Falconidae
- 属
- Falco
分布与栖息地
- 迁徙
- Resident species
行为
The spotted kestrel displays similar habits to that of the common kestrel. Although, spotted kestrels live more sedentary lives when compared to their sister group, F. tinnunculus.<p>Little is known about their breeding habits. Although, they were observed to be in a pre-breeding behaviour in June–July, during the dry season. In one instance, breeding was observed in August. Although, they also displayed breeding behaviour in December–January, during the wet season. It may be possible that they breed during both seasons, although more information is needed.<p>The spotted kestrel feeds primarily on small mammals, birds (mostly waterfowl and doves), lizards, and insects.<p>The feeding behaviour of the spotted kestrel is not well known. But we can deduced the diet by looking at their closest relative, the Nankeen Kestrel (F. cenchroides). On Christmas Island, an island south of Java, Nankeen kestrels have colonized the island. The giant grasshopper (V. irregularis) consisted 97% of their caught prey. Insects are preyed on the most, but vertebrates make up the weight of their diet. They were also seen preying on spotted dove, western bearded dragons, mice, and other birds such as the common starlings.<p>Displaying similar nesting habits to other kestrels, the spotted kestrel can be found occupying human-made structures, abandoned nests, and cliff sides. In Indonesia, nests were found in a variety of locations, including the peaked roofs of traditional houses or in the crowns of palm trees. Nests are usually occupied from March through September or October during mating season. Similar to other falcons, the spotted kestrel does not build its own nests. Instead, it lays its eggs in abandoned nests built by other raptors or corvids. They were also seen in nesting in traditional Sumbanese houses, as they provide shelter and elevation. They prefer high elevation and open habitats.<p>When looking at the nesting behaviour of their sister taxon (Nankeen Kestrel), clutch sizes range from 3–5 eggs. Incubation periods last up to 28 days. Males were seen assisting the females with the incubation. The fledging period last for 31 to 35 days.<p>The spotted kestrel has a call described as common, a keek, keek, keek, similar to other kestrels. While in flight, they tend to use a more scream-like call, rrrrit, rrrrit, rrrrit.
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
Rufous-winged Cisticola
Cisticola galactotes
Relatively colorful, mid-sized, long-tailed cisticola of wetlands. Note the brown back with thick black streaks, rufous on the wing and cap, and whitish underparts. Found in reedbeds, and locally in wet scrub. Song varies across the range. Song a slow series of rough “chyup” notes. Similar to Levaillant’s Cisticola, but Rufous-winged has a gray or brown tail and an unstreaked rump. Relatively bold colors separate the two from other cisticolas.
Andean Pygmy-Owl
Glaucidium jardinii
Very small owl of the upper subtropics and temperate forest. Typical pygmy-owl plumage: mostly brown or rufous above, white below with messy brown stripes, and small whitish spots on crown. Sexes similar. Found at higher elevations than other pygmy-owls, mostly from 2,500–3,500 m. Usually seen in the daytime perched at middle or upper levels of forest, often being mobbed by hummingbirds or small passerines. Typically detected by song, which can be given at any time of day but mainly early and late: a series of whistled toots, sometimes with a few quavering notes at the beginning.
Black-crowned Tityra
Tityra inquisitor
Handsome, mostly silvery gray bird of tropical lowland forest and adjacent semi-open areas with taller trees. Usually found at mid-upper levels of fruiting trees, sometimes in small groups that mix readily with the commoner Masked Tityra. Black-crowned is told from slightly larger Masked by its solidly black bill. Male is more silvery overall, with a black cap; female had brown face and smaller black cap. Tityras nest in tree cavities, that they sometimes steal from woodpeckers.
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