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1 July 2005 Radio-tracking of female Tree Swallows prior to egg-laying
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Abstract

We radio-tracked eight female Tree Swallows (Tachycineta bicolor) prior to egg-laying in 2000 and 2001. Six females made movements >2 km to evening roosting sites. Females often roosted farther away than the nearest available roost site, they used different roosts on different nights, and during the day they foraged up to 10 km from their nest site. Thus, female swallows move over a large area (103 km2) prior to egg-laying. These widespread movements appear to be unusual among swallows, and they may allow females to survey a large number of extra-pair males.

Peter O. Dunn and Linda A. Whittingham "Radio-tracking of female Tree Swallows prior to egg-laying," Journal of Field Ornithology 76(3), 259-263, (1 July 2005). https://doi.org/10.1648/0273-8570-76.3.259
Received: 23 August 2004; Accepted: 1 November 2004; Published: 1 July 2005
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