منابع مشابه
The Nesting of the Great Horned Owl
ON March 19, 1926, the nest of a Great Horned Owl (Bubo virginianus pallescens?) was found in one of the thickly wooded canyons on the military reservation, Fort Riley, Kansas, which presented an unusual opportunity for intimate study of the nest life and growth of the young from very early in their life history until the leaving of the nest. The terrain consists of rolling grass-covered hills ...
متن کاملPellet Formation in a Great Horned Owl: a Roentgenographic Study
IN the literature on owls, there has been much interest in the formation in the upper gastro-intestinal tract of pellets which contain indigestible material and which are subsequently regurgitated. This feature of gastrointestinal function has interested bird physiologists, and analysis of the pellets has been used to monitor feeding habits (Errington et al., 1940). Although pellet formation is...
متن کاملELECTRORETINOGRAPHIC RESPONSES OF THE GREAT HORNED OWL ( Bubo virginianus ) STEVEN J . AULT AND EDWIN
ABSTR^CT.--Electroretinograms were recorded from four Great Horned Owls (Bubo virginianus). Two procedures, dark adaptation and flicker stimuli, were used to assess the contributions of rod and cone systems to electroretinograms. Recordings obtained after dark adaptation demonstrated scotopic (rodgenerated) components. B-waves were broad and rounded and had a fairly long latency. When high inte...
متن کاملCineradiographic Studies of Gastric Motility in the Great Horned Owl (bubo Virginianus)
Gastric motility in the Great Horned Owl (Bubo virginianus) has been the subject of few previous studies. A gastroduodenal contraction sequence beginning with the glandular stomach (proventriculus), then the muscular stomach (gizzard), and lastly the duodenum was observed radiographically by Reed and Reed (1928) and Kostuch and Duke (1975). Contractions arise near the isthmus in the muscular st...
متن کاملSpatial selectivity and binaural responses in the inferior colliculus of the great horned owl.
In this study we have investigated the processing of auditory cues for sound localization in the great horned owl (Bubo virginianus). Previous studies have shown that the barn owl, whose ears are asymmetrically oriented in the vertical plane, has a 2-dimensional, topographic representation of auditory space in the external division of the inferior colliculus (ICx). As in the barn owl, the great...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1962
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2652