Cinereous Owl
Strix sartorii
Large, dark-eyed owl restricted to pine and pine-oak forests in western and central Mexico. Apparently rare and local; only known from a handful of sites. Roosts at mid- to upper-levels in large trees, sometimes in fairly open situations. Primarily nocturnal, but can be active at all times of day, especially in the early morning and late afternoon. Note dark eyes, cold brown and gray tones to the plumage, and combination of barring on the breast and streaking on the belly. Compare with Mottled Owl, which is smaller and darker brown. Listen for distinctive strong hoots, but beware distant dogs or other owl species.
识别特征
Very few specimens of cinereous owl have been measured. The limited number of measurements indicate lengths between 430 and 505 cm (14.11 and 16.57 ft), male weights between 469 and 812 g (1.034 and 1.790 lb), and female weights between 610 and 1,051 g (1.345 and 2.317 lb) This large round-headed owl's upperparts are brownish gray with whitish to buff bars. It has grayish white to brownish gray facial disks surrounded by darker brown and buffy bars. Its underparts are pale buff to white with dark streaks.
分类信息
The cinereous owl has variously been considered a subspecies of barred owl (Strix varia) or even a barred owl that included what is now the fulvous owl (Strix fulvescens). However, since 2010, vocal and genetic differences have been shown to warrant its treatment as a species in its own right, according to the International Ornithological Committee (IOC) and the Clements taxonomy. However, as of December 2020 the BirdLife International Handbook of the Birds of the World retains it as a subspecies of barred owl.
- 学名
- Strix sartorii
- 命名信息
- (Ridgway, 1874)
- 目
- Strigiformes
- 科
- Strigidae
- 属
- Strix
分布与栖息地
The cinerous owl appears to occur in three disjunct areas. The largest is along the Sierra Madre Oriental between San Luis Potosi in the north and Veracruz in the south. The next largest is a band from Durango south to Michoacán and the third is a relatively small area in Guerrero. It is believed to formerly have occurred in Oaxaca.
行为
Little is known about the cinereous owl's foraging strategy or diet, but both are assumed to be similar to that of the barred owl. That species is semi-nocturnal to nocturnal and is an opportunistic predator on small mammals and lagomorphs, small birds, reptiles, and invertebrates.<p>The only information about the cinereous owl's breeding phenology comes from the observation of a fledgling of unknown age in Nayarit in early June. It had well-developed flight feathers but downy body plumage.<p>The first recordings of the cinereous owl's vocalizations were made in 2015 and very few since then. It has a variety of hoots and other calls.
照片
分布
鸟叫声
其他鸟类
Greater Honeyguide
Indicator indicator
This large honeyguide is a mostly brownish bird with white outer tail feathers and an upright posture. It is one of the most distinctive members of its family and has frosted white edgings to the shoulder feathers. Sexes differ: the male has a pink bill, black throat, and large white “ear muffs’; the female has a dark bill and pale throat. The immature has a yellow throat and breast. Singles and pairs are inconspicuous in woodland, open cultivated areas, and gardens; they often raid bees’ nests to eat wax, eggs, and larvae. Most often seen in undulating flight; may also be tracked down by following its unique vocalization, a series of strident two-noted segments: “VIC-tor, VIC-tor, VIC-tor”.
Helmeted Woodpecker
Celeus galeatus
Fairly large woodpecker. A usually rare inhabitant of extensive humid forests. Note cinnamon face, red head with a prominent crest, and white stripes on the side of the neck. Solid black back and wings, and heavily barred below with a pale rump. Males have a red moustache. A mimic of the much larger Robust Woodpecker.
Scaly Weaver
Sporopipes squamifrons
A very small, sandy-colored finch-like weaver with a scaly crown, a pale pink bill, and a black moustache on a white throat that gives it a fierce-looking expression. Small groups are resident and nomadic in grassy arid savanna, where there are trees and scrub nearby in which to build their untidy oval grass nests. The species sometimes gives a soft, reedy “cheet-cheet-cheet” flight call. The Sociable Weaver is much larger than the Scaly Weaver, with a blue-gray bill.
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