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1 December 2006 Pair Roosting of Nesting Carolina Wrens (Thryothorus ludovicianus)
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Abstract

Carolina Wrens (Thryothorus ludovicianus), which maintain lifetime pair bonds and year-round territories, huddle in pair or communal roosts during the non-breeding season, particularly during cold winter nights. Pair roosting during the nesting season, however, is not known to occur. Here, we report huddled pair roosting by Carolina Wrens in Florida. The dates of pair roosting took place during nest construction through laying of the first egg (9–20 March 2004), and also on the date the fourth egg was laid in a clutch of five (24 March). The wrens roosted in a hanging flower basket located 2.4 m from their nest site. Although huddled pair roosting by wrens during periods of low ambient temperatures in the non-breeding season likely achieves thermal conservation, the benefits derived during the breeding season remain unclear. We discuss the possible thermoregulatory and pair-bond maintenance functions of pair roosting.

Ronald F. Labisky and John E. Arnett "Pair Roosting of Nesting Carolina Wrens (Thryothorus ludovicianus)," The Wilson Journal of Ornithology 118(4), (1 December 2006). https://doi.org/10.1676/05-109.1
Received: 6 September 2005; Accepted: 1 July 2006; Published: 1 December 2006
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