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How males in the house wren, a cavity-nesting songbird, discover that eggs have hatched and transition to provisioning nestlings L. Scott Johnson 1) , Jessica L. Brubaker 2) & Bonnie G. P. Johnson (Department of Biological Sciences, Towson University, Towson, MD 21252, USA) (Accepted: 17 April 2008) Summary In many bird species that conceal nests within cavities or burrows, only females incubate eggs, but both sexes feed young after hatching. How males in such species discover that eggs have hatched and start provisioning offspring is unknown. We video-taped 26 house wren ( Troglodytes aedon ) nests continuously before, during, and after hatching began to test four hypotheses as to how males might learn of hatching: (i) females signal hatching to males; (ii) males hear hatchlings vocalizing; (iii) males observe changes in their mate’s behaviour (e.g., entering and exiting nests more frequently and/or carrying eggshells or food); and (iv) males enter the nest cavity and encounter hatchlings directly. We did not detect any unique visual or vocal displays by females immediately post-hatching and so could not support the first hypothesis. At only three of 26 nests did it appear that males might have been stimulated to begin feeding solely as
Behaviour – Brill
Published: Jan 1, 2008
Keywords: PARENTAL CARE; TROGLODYTES AEDON; CAVITY-NESTING; HATCHING; HOUSE WREN
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