Journal of Ethology

, Volume 30, Issue 1, pp 29–34

Post-fledging brood and care division in the roseate tern (Sterna dougallii)

  • Maggie J. Watson
  • Jeffrey A. Spendelow
  • Jeremy J. Hatch

DOI: 10.1007/s10164-011-0286-9

Cite this article as:
Watson, M.J., Spendelow, J.A. & Hatch, J.J. J Ethol (2012) 30: 29. doi:10.1007/s10164-011-0286-9


Extended post-fledging parental care is an important aspect of parental care in birds, although little studied due to logistic difficulties. Commonly, the brood is split physically (brood division) and/or preferential care is given to a subset of the brood by one parent or the other (care division). Among gulls and tern (Laridae), males and females generally share parental activities during the pre-fledging period, but the allocation of parental care after fledging is little documented. This study examined the behaviour of male and female roseate terns (Sterna dougallii) during the late chick-rearing and early post-fledging periods, and in particular the amount of feeds and the time spent in attendance given to individual chicks/fledglings. Pre-fledging parental care was biparental in all cases. Post-fledging parental care was dependent on the number of fledglings in the brood. Males and females continued biparental care in clutches with one surviving fledgling, while in two-fledgling clutches, males fed the A-fledgling while females fed the B-fledgling. Overall, there was no difference in attendance, only in feeds. This division of care may be influenced by the male only being certain of the paternity of the A-chick but not by chick sex.


Brood divisionCare divisionParental carePost-fledgingRoseate ternSterna dougallii

Copyright information

© Japan Ethological Society and Springer 2011

Authors and Affiliations

  • Maggie J. Watson
    • 1
    • 3
  • Jeffrey A. Spendelow
    • 2
  • Jeremy J. Hatch
    • 1
  1. 1.Department of BiologyUniversity of MassachusettsBostonUSA
  2. 2.USGS Patuxent Wildlife Research CenterLaurelUSA
  3. 3.School of Animal and Veterinary SciencesCharles Sturt UniversityWagga WaggaAustralia