Filters: Tags: video surveillance (X)
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Obtaining reliable estimates of absolute and relative reproductive rates is challenging for avian species whose nests are difficult to observe, such as the burrowing owl (Athene cunicularia). We compared methods for estimating reproductive rates of burrowing owls, defined as the number of 21- to 28-day-old young per Successful nest. We compared observations using (1) the mean and (2) the maximum number of young observed during 5 30-min observation periods, and (3) the maximum number of voting videotaped during 2-hr video surveillance. We evaluated the reliability of these methods with the known number of young present in nest boxes. All 3 methods performed poorly as estimators of absolute reproductive rates (absolute...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Athene cunicularia,
California,
Journal of Wildlife Management,
brood size,
burrowing owl,
The data set provides information on the fledging times of passerine grassland birds. Data were collected from video surveillance of 70 nests of 9 bird species that nested in grasslands of Minnesota and North Dakota, USA. The data include year, unique nest number, species, date and time of fledging by nestling.
Categories: Data;
Tags: Baird's Sparrow,
Bobolink,
Brown-headed Cowbird,
Chestnut-collared Longspur,
Clay-colored Sparrow,
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