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1 September 2012 Estimation of Female Home-range Size During the Nestling Period of Dark-eyed Juncos
Dustin G. Reichard, Ellen D. Ketterson
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Studies of spatial activity of songbirds during the nesting cycle have largely focused on male activity and neglected female space use, particularly outside the fertile period. We estimated the home-range size of seven female Dark-eyed Juncos (Junco hyemalis) 3 days after their nestlings had hatched. We used radiotelemetry to track female movements for 2 hrs on the afternoon of day 3 of nestling life, and 2 hrs on both the morning and afternoon of days 4 and 5. Female location and behavior were recorded every 10 min for the duration of tracking. Females exhibited a mean home-range size of 0.833 ha (range  =  0.156–2.450 ha). Our estimate of home-range size during the nestling period was significantly smaller than a previous estimate of female home-range size during the fertile period in the same junco population. Home-range size varied greatly between individuals, and the observed differences may be attributable to variation in resource availability.

Dustin G. Reichard and Ellen D. Ketterson "Estimation of Female Home-range Size During the Nestling Period of Dark-eyed Juncos," The Wilson Journal of Ornithology 124(3), 614-620, (1 September 2012).
Received: 2 November 2011; Accepted: 1 February 2012; Published: 1 September 2012

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