Open AccessDoes begging call convergence increase feeding rates to nestling tree swallows Tachycineta bicolor ?
Author(s) -
Leonard Marty L.,
Horn Andrew G.,
Dorland Alexandra
Publication year - 2009
Publication title -
journal of avian biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.022
H-Index - 76
eISSN - 1600-048X
pISSN - 0908-8857
DOI - 10.1111/j.1600-048x.2009.04672.x
Subject(s) - biology , brood , begging , offspring , zoology , paternal care , nest (protein structural motif) , ecology , political science , law , pregnancy , biochemistry , genetics
Some studies suggest that offspring might coordinate their begging displays to send a more effective brood signal, which in turn, could increase parental feeding rates. In tree swallows Tachycineta bicolor , when nestlings call together, their calls are more similar in structure than when they call alone. Here, we tested the hypothesis that call convergence enhances the overall brood signal, thus increasing parental provisioning rates. We played back similar and dissimilar calls (as measured by cross‐correlation) to parents during a one‐h playback period, and filmed the response of parents and nestlings. Contrary to our hypothesis, parental feeding rates did not differ in relation to call similarity. Based on these results, call similarity does not appear to function as a coordinated brood signal in tree swallows.