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Female Tree Swallow home-range movements during their fertile period as revealed by radio-tracking.
Wilson Journal of Ornithology, The, December, 2006 by Robertson, Raleigh J.; Stapleton, Mary K.
Tree Swallows (Tachycineta bicolor) show one of the highest levels of extra-pair mating among bird species, yet extra-pair copulations are rarely observed. Despite the suggestion that extra-pair copulations could be taking place away from nest sites, very little is known about movement patterns of individual Tree Swallows during the pre-laying and laying periods.
We used radio telemetry to track movement patterns of four female Tree Swallows at dawn and dusk during the pre-laying and laying periods. Our tracking results indicate that individual females differed in their movement patterns: ...
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