Prevalence of Disjunct Roosting in Nesting Bank Swallows (Riparia riparia)
| Autor: | Douglas C. Tozer, Philip D. Taylor, Greg W. Mitchell, C. Myles Falconer |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
geography Riparia Marsh geography.geographical_feature_category Evening Ecology biology Nocturnal Disjunct biology.organism_classification 010603 evolutionary biology 01 natural sciences 010605 ornithology Animal Science and Zoology Ecology Evolution Behavior and Systematics Morning |
| Zdroj: | The Wilson Journal of Ornithology. 128:429-434 |
| ISSN: | 1938-5447 1559-4491 |
| Popis: | Bank Swallows (Riparia riparia) congregate in large nocturnal roosts during the non-breeding season. Scant evidence suggests that Bank Swallows may also congregate regularly in nocturnal roosts during the breeding period. To help clarify the issue, we used automated radio-telemetry to document the roosting behavior of 11 males and 11 females that were tending nests with young at two nesting colonies. Nineteen of the 22 birds (86%) spent at least one night roosting away from the colony, and 13 of the 22 birds (59%) spent at least one night roosting likely within a large marsh located ~30 km away from the colonies. Females tended to roost overnight at the colony more than males. The proportion of nights birds spent roosting away from the colony was highly variable between individuals. Minimum flight speeds to an evening roost site (~30 km distant) were significantly greater than return flights back to the colony in the morning. Our study confirms that breeding Bank Swallows do in fact regularly roo... |
| Databáze: | OpenAIRE |
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