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The western screech owl (Megascops kennicottii) is a small owl native to North and Central America, closely related to the eastern screech owl. The scientific name commemorates the American naturalist Robert Kennicott .
A screech owl fossil from the Late Pliocene of Kansas [4] (which is almost identical to eastern and western screech owls) indicates a longstanding presence of these birds in the Americas, while coeval scops owl fossils very similar to the Eurasian scops owl have been found at S'Onix on Majorca. [5]
The eastern screech owl's call is a tremolo with a descending, whinny-like quality, like that of a miniature horse. They also produce a monotone purring trill lasting 3–5 seconds. Their voices are unmistakable and follow a noticeably different phrasing than that of the western screech owl.
White-throated screech owl: Megascops albogularis (Cassin, 1849) 209 Tropical screech owl: Megascops choliba (Vieillot, 1817) 210 Bearded screech owl: Megascops barbarus (Sclater, PL & Salvin, 1868) 211 Pacific screech owl: Megascops cooperi (Ridgway, 1878) 212 Western screech owl: Megascops kennicottii (Elliot, DG, 1867) 213 Eastern screech owl
The Western Screech owl is being outcompeted and preyed upon by the invasive barred owl. The Widgeon Valley is an essential region to the western screech owl as its main competitor, the barred owl, has yet to establish a population in the valley. [6] Climate change poses a significant threat to the western screech owl through habitat ...
The extent of predation on other owls depends on the habitat preferences of the other species. Eastern and western screech owls may be most vulnerable since they prefer similar wooded edge habitat. In a block of Wisconsin, great horned owls were responsible for the failure of 78% of eastern screech owl's nests. [24]
The white-throated screech owl is a large member of its genus. It is 20 to 26 cm (7.9 to 10.2 in) long and weighs 130 to 185 g (4.6 to 6.5 oz). It is overall dark plumaged, has a round head with very small ear tufts, and a longish tail. Adults of the nominate subspecies have a dark brown head and upperparts with small blackish, reddish, and ...
Western screech-owl, Megascops kennicottii (Unk) Great horned owl, Bubo virginianus; Snowy owl, Bubo scandiacus (NC) Northern pygmy-owl, Glaucidium gnoma; Spotted owl, Strix occidentalis (U) Barred owl, Strix varia; Great gray owl, Strix nebulosa (NC) Long-eared owl, Asio otus (O) Boreal owl, Aegolius funereus (NC) Northern saw-whet owl ...