Summer Record of a Snowy Owl
نویسندگان
چکیده
منابع مشابه
Snowy Owl Predation on Short-eared Owls
A problem confronting Snowy Owls (Nyctea scandiaca) in their southern incursions is the shortage of food. This difficulty is raised by the presence of other raptors that feed on small mammals. This note shows how little food is found by migrant Snowy Owls and indicates a complex temporary ecological solution. At Tatoosh Island, Washington (48”24’ N, 124” 44’ W) on 25 November 1973, we observed ...
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Dactylaria constricta var. gallopava (Cooke) Salkin et Dixon was found to cause fatal encephalitis in a 28-day-old, captivity-bred snowy owl chick (Nyctea scandiaca). The previously healthy bird suddenly developed ataxia, severe torticollis, and extensor rigidity of the legs. Since the animal did not improve with antibiotic or vitamin-mineral supplement therapy, the chick was euthanized 5 days ...
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—Data on Snowy Owl ( Nyctea scandiaca) reproduction on Wrangel Island were collected for six seasons fr om a total of 423 nests. Nest densities ranged fr om 0.15 to 0.40 nests/km 2. Mean clutch size for all 6 years was 6.5 (fr om 5.3 to 8.4) being significantly higher during low lemming season (7.17) (N = 29) than for peak lemming season (6.0, p < 0.001). Clutch size corr elated with weather co...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1965
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay3053