Journal of Ethology

, Volume 24, Issue 3, pp 305–307 | Cite as

A new record of amphisexual care in an insect with exclusive paternal care: Rhynocoris tristis (Heteroptera: Reduviidae)

  • Christy A. Beal
  • Douglas W. TallamyEmail author


We describe the first record of amphisexual care in an insect with uniparental male care. Male Rhynocoris tristis are noted for aggressively guarding multiple egg masses. When a male is unable or unwilling to guard eggs, a female that has previously contributed eggs returns to the egg mass and defends it until the eggs hatch. We compared the frequency and intensity of parental aggression in both sexes and found no difference in either form of guarding behavior. Evidence of amphisexual care in R. tristis provides an opportunity to quantify the cost of care in both sexes within a single species.


Heteroptera Rhynocoris tristis Reduviidae Facultative care Amphisexual care Paternal care 



We thank Lisa Thomas for encouraging us to continue her work on Rhynocoris tristis after she left science, Dr. Cyprian Ebong for facilitating our studies at the Namulonge Agricultural and Animal Production Research Institute, Uganda, and the University of Delaware Research Expeditions fund for financing our trip to Uganda.


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Copyright information

© Japan Ethological Society and Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of Entomology and Wildlife EcologyUniversity of DelawareNewarkUSA

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